Finding the Third Proportional to 54,691.59 and 84,370.78

Step by Step Solution

1. Step 1: Write the proportion equation
   54,691.59 : 84,370.78 = 84,370.78 : x
2. Step 2: Convert to fraction form
   54,691.59/84,370.78 = 84,370.78/x
3. Step 3: Cross multiply
   54,691.59x = 84,370.78 × 84,370.78
4. Step 4: Simplify right side
   54,691.59x = 7,118,428,728.74
5. Step 5: Solve for x
   x = 7,118,428,728.74/54,691.59
6. Step 6: Final answer
   x = 130,155.81