Finding the Third Proportional to 42,148.50 and 90,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,148.50 : 90,310.50 = 90,310.50 : x
2. Step 2: Convert to fraction form
   42,148.50/90,310.50 = 90,310.50/x
3. Step 3: Cross multiply
   42,148.50x = 90,310.50 × 90,310.50
4. Step 4: Simplify right side
   42,148.50x = 8,155,986,410.25
5. Step 5: Solve for x
   x = 8,155,986,410.25/42,148.50
6. Step 6: Final answer
   x = 193,505.97