Finding the Fourth Proportional to 76,481.92, 105,545.55 and 42,490

Step by Step Solution

1. Step 1: Write the proportion equation
   76,481.92 : 105,545.55 = 42,490 : x
2. Step 2: Convert to fraction form
   76,481.92/105,545.55 = 42,490/x
3. Step 3: Cross multiply
   76,481.92x = 105,545.55 × 42,490
4. Step 4: Simplify right side
   76,481.92x = 4,484,630,419.50
5. Step 5: Solve for x
   x = 4,484,630,419.50/76,481.92
6. Step 6: Final answer
   x = 58,636.48