Finding the Third Proportional to 53,686.13 and 72,874.69

Step by Step Solution

1. Step 1: Write the proportion equation
   53,686.13 : 72,874.69 = 72,874.69 : x
2. Step 2: Convert to fraction form
   53,686.13/72,874.69 = 72,874.69/x
3. Step 3: Cross multiply
   53,686.13x = 72,874.69 × 72,874.69
4. Step 4: Simplify right side
   53,686.13x = 5,310,720,078.22
5. Step 5: Solve for x
   x = 5,310,720,078.22/53,686.13
6. Step 6: Final answer
   x = 98,921.65