Finding the Fourth Proportional to 56,632.81, 78,155.28 and 31,141.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,632.81 : 78,155.28 = 31,141.12 : x
2. Step 2: Convert to fraction form
   56,632.81/78,155.28 = 31,141.12/x
3. Step 3: Cross multiply
   56,632.81x = 78,155.28 × 31,141.12
4. Step 4: Simplify right side
   56,632.81x = 2,433,842,953.11
5. Step 5: Solve for x
   x = 2,433,842,953.11/56,632.81
6. Step 6: Final answer
   x = 42,975.85