Finding the Fourth Proportional to 76,481.20, 105,545.39 and 42,492.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,481.20 : 105,545.39 = 42,492.79 : x
2. Step 2: Convert to fraction form
   76,481.20/105,545.39 = 42,492.79/x
3. Step 3: Cross multiply
   76,481.20x = 105,545.39 × 42,492.79
4. Step 4: Simplify right side
   76,481.20x = 4,484,918,092.74
5. Step 5: Solve for x
   x = 4,484,918,092.74/76,481.20
6. Step 6: Final answer
   x = 58,640.79