Finding the Fourth Proportional to 56,637.42, 78,159.94 and 31,145.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,637.42 : 78,159.94 = 31,145.42 : x
2. Step 2: Convert to fraction form
   56,637.42/78,159.94 = 31,145.42/x
3. Step 3: Cross multiply
   56,637.42x = 78,159.94 × 31,145.42
4. Step 4: Simplify right side
   56,637.42x = 2,434,324,158.47
5. Step 5: Solve for x
   x = 2,434,324,158.47/56,637.42
6. Step 6: Final answer
   x = 42,980.84