Finding the Third Proportional to 3,921,952,828.50 and 8,403,423,719.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921,952,828.50 : 8,403,423,719.25 = 8,403,423,719.25 : x
2. Step 2: Convert to fraction form
   3,921,952,828.50/8,403,423,719.25 = 8,403,423,719.25/x
3. Step 3: Cross multiply
   3,921,952,828.50x = 8,403,423,719.25 × 8,403,423,719.25
4. Step 4: Simplify right side
   3,921,952,828.50x = 70,617,530,205,253,500,928
5. Step 5: Solve for x
   x = 70,617,530,205,253,500,928/3,921,952,828.50
6. Step 6: Final answer
   x = 18,005,706,160.48