Finding the Third Proportional to 421,139,719.50 and 908,867,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   421,139,719.50 : 908,867,269.50 = 908,867,269.50 : x
2. Step 2: Convert to fraction form
   421,139,719.50/908,867,269.50 = 908,867,269.50/x
3. Step 3: Cross multiply
   421,139,719.50x = 908,867,269.50 × 908,867,269.50
4. Step 4: Simplify right side
   421,139,719.50x = 826,039,713,568,385,664
5. Step 5: Solve for x
   x = 826,039,713,568,385,664/421,139,719.50
6. Step 6: Final answer
   x = 1,961,438,627.90