Finding the Fourth Proportional to 56,223.76, 77,586.60 and 31,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,223.76 : 77,586.60 = 31,072.72 : x
2. Step 2: Convert to fraction form
   56,223.76/77,586.60 = 31,072.72/x
3. Step 3: Cross multiply
   56,223.76x = 77,586.60 × 31,072.72
4. Step 4: Simplify right side
   56,223.76x = 2,410,826,697.55
5. Step 5: Solve for x
   x = 2,410,826,697.55/56,223.76
6. Step 6: Final answer
   x = 42,879.14