Finding the Third Proportional to 90,319.50 and 187,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,319.50 : 187,807.50 = 187,807.50 : x
2. Step 2: Convert to fraction form
   90,319.50/187,807.50 = 187,807.50/x
3. Step 3: Cross multiply
   90,319.50x = 187,807.50 × 187,807.50
4. Step 4: Simplify right side
   90,319.50x = 35,271,657,056.25
5. Step 5: Solve for x
   x = 35,271,657,056.25/90,319.50
6. Step 6: Final answer
   x = 390,520.95