Finding the Third Proportional to 90,787.50 and 137,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,787.50 : 137,407.50 = 137,407.50 : x
2. Step 2: Convert to fraction form
   90,787.50/137,407.50 = 137,407.50/x
3. Step 3: Cross multiply
   90,787.50x = 137,407.50 × 137,407.50
4. Step 4: Simplify right side
   90,787.50x = 18,880,821,056.25
5. Step 5: Solve for x
   x = 18,880,821,056.25/90,787.50
6. Step 6: Final answer
   x = 207,967.19