Finding the Fourth Proportional to 76,470.67, 105,546.39 and 42,490.83

Step by Step Solution

1. Step 1: Write the proportion equation
   76,470.67 : 105,546.39 = 42,490.83 : x
2. Step 2: Convert to fraction form
   76,470.67/105,546.39 = 42,490.83/x
3. Step 3: Cross multiply
   76,470.67x = 105,546.39 × 42,490.83
4. Step 4: Simplify right side
   76,470.67x = 4,484,753,502.15
5. Step 5: Solve for x
   x = 4,484,753,502.15/76,470.67
6. Step 6: Final answer
   x = 58,646.72