Finding the Third Proportional to 61,031.25 and 91,487.25

Step by Step Solution

1. Step 1: Write the proportion equation
   61,031.25 : 91,487.25 = 91,487.25 : x
2. Step 2: Convert to fraction form
   61,031.25/91,487.25 = 91,487.25/x
3. Step 3: Cross multiply
   61,031.25x = 91,487.25 × 91,487.25
4. Step 4: Simplify right side
   61,031.25x = 8,369,916,912.56
5. Step 5: Solve for x
   x = 8,369,916,912.56/61,031.25
6. Step 6: Final answer
   x = 137,141.50