Finding the Fourth Proportional to 78,393.89, 108,123.96 and 54,235.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,393.89 : 108,123.96 = 54,235.05 : x
2. Step 2: Convert to fraction form
   78,393.89/108,123.96 = 54,235.05/x
3. Step 3: Cross multiply
   78,393.89x = 108,123.96 × 54,235.05
4. Step 4: Simplify right side
   78,393.89x = 5,864,108,782.91
5. Step 5: Solve for x
   x = 5,864,108,782.91/78,393.89
6. Step 6: Final answer
   x = 74,803.13