Finding the Fourth Proportional to 76,488.54, 105,565.59 and 60,318.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,488.54 : 105,565.59 = 60,318.78 : x
2. Step 2: Convert to fraction form
   76,488.54/105,565.59 = 60,318.78/x
3. Step 3: Cross multiply
   76,488.54x = 105,565.59 × 60,318.78
4. Step 4: Simplify right side
   76,488.54x = 6,367,587,598.78
5. Step 5: Solve for x
   x = 6,367,587,598.78/76,488.54
6. Step 6: Final answer
   x = 83,248.91