Finding the Fourth Proportional to 76,371.28, 105,404.96 and 42,390.73

Step by Step Solution

1. Step 1: Write the proportion equation
   76,371.28 : 105,404.96 = 42,390.73 : x
2. Step 2: Convert to fraction form
   76,371.28/105,404.96 = 42,390.73/x
3. Step 3: Cross multiply
   76,371.28x = 105,404.96 × 42,390.73
4. Step 4: Simplify right side
   76,371.28x = 4,468,193,200.02
5. Step 5: Solve for x
   x = 4,468,193,200.02/76,371.28
6. Step 6: Final answer
   x = 58,506.20