Finding the Third Proportional to 54,553.50 and 83,880.56

Step by Step Solution

1. Step 1: Write the proportion equation
   54,553.50 : 83,880.56 = 83,880.56 : x
2. Step 2: Convert to fraction form
   54,553.50/83,880.56 = 83,880.56/x
3. Step 3: Cross multiply
   54,553.50x = 83,880.56 × 83,880.56
4. Step 4: Simplify right side
   54,553.50x = 7,035,948,765.32
5. Step 5: Solve for x
   x = 7,035,948,765.32/54,553.50
6. Step 6: Final answer
   x = 128,973.37