Finding the Third Proportional to 56,166.19 and 85,402.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,166.19 : 85,402.69 = 85,402.69 : x
2. Step 2: Convert to fraction form
   56,166.19/85,402.69 = 85,402.69/x
3. Step 3: Cross multiply
   56,166.19x = 85,402.69 × 85,402.69
4. Step 4: Simplify right side
   56,166.19x = 7,293,619,032.22
5. Step 5: Solve for x
   x = 7,293,619,032.22/56,166.19
6. Step 6: Final answer
   x = 129,857.83