Finding the Third Proportional to 53,851.50 and 89,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,851.50 : 89,439.50 = 89,439.50 : x
2. Step 2: Convert to fraction form
   53,851.50/89,439.50 = 89,439.50/x
3. Step 3: Cross multiply
   53,851.50x = 89,439.50 × 89,439.50
4. Step 4: Simplify right side
   53,851.50x = 7,999,424,160.25
5. Step 5: Solve for x
   x = 7,999,424,160.25/53,851.50
6. Step 6: Final answer
   x = 148,545.99