Finding the Fourth Proportional to 76,280.71, 105,273.59 and 42,299.85

Step by Step Solution

1. Step 1: Write the proportion equation
   76,280.71 : 105,273.59 = 42,299.85 : x
2. Step 2: Convert to fraction form
   76,280.71/105,273.59 = 42,299.85/x
3. Step 3: Cross multiply
   76,280.71x = 105,273.59 × 42,299.85
4. Step 4: Simplify right side
   76,280.71x = 4,453,056,895.01
5. Step 5: Solve for x
   x = 4,453,056,895.01/76,280.71
6. Step 6: Final answer
   x = 58,377.23