Finding the Third Proportional to 78,157.50 and 121,098

Step by Step Solution

1. Step 1: Write the proportion equation
   78,157.50 : 121,098 = 121,098 : x
2. Step 2: Convert to fraction form
   78,157.50/121,098 = 121,098/x
3. Step 3: Cross multiply
   78,157.50x = 121,098 × 121,098
4. Step 4: Simplify right side
   78,157.50x = 14,664,725,604
5. Step 5: Solve for x
   x = 14,664,725,604/78,157.50
6. Step 6: Final answer
   x = 187,630.43