Finding the Fourth Proportional to 56,665.82, 78,198.84 and 31,172.54

Step by Step Solution

1. Step 1: Write the proportion equation
   56,665.82 : 78,198.84 = 31,172.54 : x
2. Step 2: Convert to fraction form
   56,665.82/78,198.84 = 31,172.54/x
3. Step 3: Cross multiply
   56,665.82x = 78,198.84 × 31,172.54
4. Step 4: Simplify right side
   56,665.82x = 2,437,656,467.85
5. Step 5: Solve for x
   x = 2,437,656,467.85/56,665.82
6. Step 6: Final answer
   x = 43,018.11