Finding the Fourth Proportional to 56,636.88, 78,159.84 and 31,144.35

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636.88 : 78,159.84 = 31,144.35 : x
2. Step 2: Convert to fraction form
   56,636.88/78,159.84 = 31,144.35/x
3. Step 3: Cross multiply
   56,636.88x = 78,159.84 × 31,144.35
4. Step 4: Simplify right side
   56,636.88x = 2,434,237,412.90
5. Step 5: Solve for x
   x = 2,434,237,412.90/56,636.88
6. Step 6: Final answer
   x = 42,979.72