Finding the Fourth Proportional to 56,636.04, 78,156.02 and 31,142.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636.04 : 78,156.02 = 31,142.42 : x
2. Step 2: Convert to fraction form
   56,636.04/78,156.02 = 31,142.42/x
3. Step 3: Cross multiply
   56,636.04x = 78,156.02 × 31,142.42
4. Step 4: Simplify right side
   56,636.04x = 2,433,967,600.37
5. Step 5: Solve for x
   x = 2,433,967,600.37/56,636.04
6. Step 6: Final answer
   x = 42,975.60