Finding the Third Proportional to 39,990 and 60,088.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,990 : 60,088.50 = 60,088.50 : x
2. Step 2: Convert to fraction form
   39,990/60,088.50 = 60,088.50/x
3. Step 3: Cross multiply
   39,990x = 60,088.50 × 60,088.50
4. Step 4: Simplify right side
   39,990x = 3,610,627,832.25
5. Step 5: Solve for x
   x = 3,610,627,832.25/39,990
6. Step 6: Final answer
   x = 90,288.27