Finding the Third Proportional to 57,748.50 and 86,386.88

Step by Step Solution

1. Step 1: Write the proportion equation
   57,748.50 : 86,386.88 = 86,386.88 : x
2. Step 2: Convert to fraction form
   57,748.50/86,386.88 = 86,386.88/x
3. Step 3: Cross multiply
   57,748.50x = 86,386.88 × 86,386.88
4. Step 4: Simplify right side
   57,748.50x = 7,462,692,172.27
5. Step 5: Solve for x
   x = 7,462,692,172.27/57,748.50
6. Step 6: Final answer
   x = 129,227.46