Finding the Fourth Proportional to 78,301.71, 108,056.65 and 42,491.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,301.71 : 108,056.65 = 42,491.71 : x
2. Step 2: Convert to fraction form
   78,301.71/108,056.65 = 42,491.71/x
3. Step 3: Cross multiply
   78,301.71x = 108,056.65 × 42,491.71
4. Step 4: Simplify right side
   78,301.71x = 4,591,511,943.88
5. Step 5: Solve for x
   x = 4,591,511,943.88/78,301.71
6. Step 6: Final answer
   x = 58,638.72