Finding the Fourth Proportional to 56,128.28, 77,436.72 and 43,211.52

Step by Step Solution

1. Step 1: Write the proportion equation
   56,128.28 : 77,436.72 = 43,211.52 : x
2. Step 2: Convert to fraction form
   56,128.28/77,436.72 = 43,211.52/x
3. Step 3: Cross multiply
   56,128.28x = 77,436.72 × 43,211.52
4. Step 4: Simplify right side
   56,128.28x = 3,346,158,375.01
5. Step 5: Solve for x
   x = 3,346,158,375.01/56,128.28
6. Step 6: Final answer
   x = 59,616.27