Finding the Third Proportional to 58,512.38 and 86,902.88

Step by Step Solution

1. Step 1: Write the proportion equation
   58,512.38 : 86,902.88 = 86,902.88 : x
2. Step 2: Convert to fraction form
   58,512.38/86,902.88 = 86,902.88/x
3. Step 3: Cross multiply
   58,512.38x = 86,902.88 × 86,902.88
4. Step 4: Simplify right side
   58,512.38x = 7,552,109,683.27
5. Step 5: Solve for x
   x = 7,552,109,683.27/58,512.38
6. Step 6: Final answer
   x = 129,068.59