Finding the Third Proportional to 87,611.25 and 137,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,611.25 : 137,255.50 = 137,255.50 : x
2. Step 2: Convert to fraction form
   87,611.25/137,255.50 = 137,255.50/x
3. Step 3: Cross multiply
   87,611.25x = 137,255.50 × 137,255.50
4. Step 4: Simplify right side
   87,611.25x = 18,839,072,280.25
5. Step 5: Solve for x
   x = 18,839,072,280.25/87,611.25
6. Step 6: Final answer
   x = 215,030.29