Finding the Fourth Proportional to 76,470.17, 105,545.69 and 42,490.33

Step by Step Solution

1. Step 1: Write the proportion equation
   76,470.17 : 105,545.69 = 42,490.33 : x
2. Step 2: Convert to fraction form
   76,470.17/105,545.69 = 42,490.33/x
3. Step 3: Cross multiply
   76,470.17x = 105,545.69 × 42,490.33
4. Step 4: Simplify right side
   76,470.17x = 4,484,671,040.54
5. Step 5: Solve for x
   x = 4,484,671,040.54/76,470.17
6. Step 6: Final answer
   x = 58,646.02