Finding the Third Proportional to 58,802.50 and 86,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,802.50 : 86,817.50 = 86,817.50 : x
2. Step 2: Convert to fraction form
   58,802.50/86,817.50 = 86,817.50/x
3. Step 3: Cross multiply
   58,802.50x = 86,817.50 × 86,817.50
4. Step 4: Simplify right side
   58,802.50x = 7,537,278,306.25
5. Step 5: Solve for x
   x = 7,537,278,306.25/58,802.50
6. Step 6: Final answer
   x = 128,179.56