Finding the Third Proportional to 55,569.38 and 84,715.88

Step by Step Solution

1. Step 1: Write the proportion equation
   55,569.38 : 84,715.88 = 84,715.88 : x
2. Step 2: Convert to fraction form
   55,569.38/84,715.88 = 84,715.88/x
3. Step 3: Cross multiply
   55,569.38x = 84,715.88 × 84,715.88
4. Step 4: Simplify right side
   55,569.38x = 7,176,779,477.02
5. Step 5: Solve for x
   x = 7,176,779,477.02/55,569.38
6. Step 6: Final answer
   x = 129,149.90