Finding the Fourth Proportional to 56,636.10, 78,159.82 and 31,144.40

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636.10 : 78,159.82 = 31,144.40 : x
2. Step 2: Convert to fraction form
   56,636.10/78,159.82 = 31,144.40/x
3. Step 3: Cross multiply
   56,636.10x = 78,159.82 × 31,144.40
4. Step 4: Simplify right side
   56,636.10x = 2,434,240,698.01
5. Step 5: Solve for x
   x = 2,434,240,698.01/56,636.10
6. Step 6: Final answer
   x = 42,980.37