Finding the Fourth Proportional to 78,325.30, 108,089.46 and 42,515.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,325.30 : 108,089.46 = 42,515.31 : x
2. Step 2: Convert to fraction form
   78,325.30/108,089.46 = 42,515.31/x
3. Step 3: Cross multiply
   78,325.30x = 108,089.46 × 42,515.31
4. Step 4: Simplify right side
   78,325.30x = 4,595,456,899.63
5. Step 5: Solve for x
   x = 4,595,456,899.63/78,325.30
6. Step 6: Final answer
   x = 58,671.42