Finding the Third Proportional to 42,088.50 and 85,351.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,088.50 : 85,351.50 = 85,351.50 : x
2. Step 2: Convert to fraction form
   42,088.50/85,351.50 = 85,351.50/x
3. Step 3: Cross multiply
   42,088.50x = 85,351.50 × 85,351.50
4. Step 4: Simplify right side
   42,088.50x = 7,284,878,552.25
5. Step 5: Solve for x
   x = 7,284,878,552.25/42,088.50
6. Step 6: Final answer
   x = 173,084.77