Finding the Fourth Proportional to 56,859.55, 78,460.85 and 54,948.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,859.55 : 78,460.85 = 54,948.69 : x
2. Step 2: Convert to fraction form
   56,859.55/78,460.85 = 54,948.69/x
3. Step 3: Cross multiply
   56,859.55x = 78,460.85 × 54,948.69
4. Step 4: Simplify right side
   56,859.55x = 4,311,321,061.16
5. Step 5: Solve for x
   x = 4,311,321,061.16/56,859.55
6. Step 6: Final answer
   x = 75,824.05