Finding the Fourth Proportional to 78,726.75, 108,681.70 and 54,546.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,726.75 : 108,681.70 = 54,546.05 : x
2. Step 2: Convert to fraction form
   78,726.75/108,681.70 = 54,546.05/x
3. Step 3: Cross multiply
   78,726.75x = 108,681.70 × 54,546.05
4. Step 4: Simplify right side
   78,726.75x = 5,928,157,442.29
5. Step 5: Solve for x
   x = 5,928,157,442.29/78,726.75
6. Step 6: Final answer
   x = 75,300.42