Finding the Fourth Proportional to 56,636.42, 78,158.55 and 31,144.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636.42 : 78,158.55 = 31,144.42 : x
2. Step 2: Convert to fraction form
   56,636.42/78,158.55 = 31,144.42/x
3. Step 3: Cross multiply
   56,636.42x = 78,158.55 × 31,144.42
4. Step 4: Simplify right side
   56,636.42x = 2,434,202,707.79
5. Step 5: Solve for x
   x = 2,434,202,707.79/56,636.42
6. Step 6: Final answer
   x = 42,979.46