Finding the Fourth Proportional to 78,563.21, 108,417.15 and 42,753.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,563.21 : 108,417.15 = 42,753.15 : x
2. Step 2: Convert to fraction form
   78,563.21/108,417.15 = 42,753.15/x
3. Step 3: Cross multiply
   78,563.21x = 108,417.15 × 42,753.15
4. Step 4: Simplify right side
   78,563.21x = 4,635,174,676.52
5. Step 5: Solve for x
   x = 4,635,174,676.52/78,563.21
6. Step 6: Final answer
   x = 58,999.31