Finding the Fourth Proportional to 56,628.46, 78,148.18 and 31,135.94

Step by Step Solution

1. Step 1: Write the proportion equation
   56,628.46 : 78,148.18 = 31,135.94 : x
2. Step 2: Convert to fraction form
   56,628.46/78,148.18 = 31,135.94/x
3. Step 3: Cross multiply
   56,628.46x = 78,148.18 × 31,135.94
4. Step 4: Simplify right side
   56,628.46x = 2,433,216,984.82
5. Step 5: Solve for x
   x = 2,433,216,984.82/56,628.46
6. Step 6: Final answer
   x = 42,968.09