Finding the Fourth Proportional to 78,541.20, 108,383.67 and 42,731.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,541.20 : 108,383.67 = 42,731.35 : x
2. Step 2: Convert to fraction form
   78,541.20/108,383.67 = 42,731.35/x
3. Step 3: Cross multiply
   78,541.20x = 108,383.67 × 42,731.35
4. Step 4: Simplify right side
   78,541.20x = 4,631,380,266.10
5. Step 5: Solve for x
   x = 4,631,380,266.10/78,541.20
6. Step 6: Final answer
   x = 58,967.53