Finding the Third Proportional to 4,200,312 and 9,160,854

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,312 : 9,160,854 = 9,160,854 : x
2. Step 2: Convert to fraction form
   4,200,312/9,160,854 = 9,160,854/x
3. Step 3: Cross multiply
   4,200,312x = 9,160,854 × 9,160,854
4. Step 4: Simplify right side
   4,200,312x = 83,921,246,009,316
5. Step 5: Solve for x
   x = 83,921,246,009,316/4,200,312
6. Step 6: Final answer
   x = 19,979,764.84