Finding the Fourth Proportional to 53,778.79, 80,499.69 and 34,778.21

Step by Step Solution

1. Step 1: Write the proportion equation
   53,778.79 : 80,499.69 = 34,778.21 : x
2. Step 2: Convert to fraction form
   53,778.79/80,499.69 = 34,778.21/x
3. Step 3: Cross multiply
   53,778.79x = 80,499.69 × 34,778.21
4. Step 4: Simplify right side
   53,778.79x = 2,799,635,123.75
5. Step 5: Solve for x
   x = 2,799,635,123.75/53,778.79
6. Step 6: Final answer
   x = 52,058.35