Finding the Fourth Proportional to 56,632.86, 78,151.68 and 31,139.19

Step by Step Solution

1. Step 1: Write the proportion equation
   56,632.86 : 78,151.68 = 31,139.19 : x
2. Step 2: Convert to fraction form
   56,632.86/78,151.68 = 31,139.19/x
3. Step 3: Cross multiply
   56,632.86x = 78,151.68 × 31,139.19
4. Step 4: Simplify right side
   56,632.86x = 2,433,580,012.34
5. Step 5: Solve for x
   x = 2,433,580,012.34/56,632.86
6. Step 6: Final answer
   x = 42,971.17