Finding the Third Proportional to 42,007.50 and 90,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.50 : 90,787.50 = 90,787.50 : x
2. Step 2: Convert to fraction form
   42,007.50/90,787.50 = 90,787.50/x
3. Step 3: Cross multiply
   42,007.50x = 90,787.50 × 90,787.50
4. Step 4: Simplify right side
   42,007.50x = 8,242,370,156.25
5. Step 5: Solve for x
   x = 8,242,370,156.25/42,007.50
6. Step 6: Final answer
   x = 196,211.87