Finding the Fourth Proportional to 56,633.69, 78,156.50 and 31,142.00

Step by Step Solution

1. Step 1: Write the proportion equation
   56,633.69 : 78,156.50 = 31,142.00 : x
2. Step 2: Convert to fraction form
   56,633.69/78,156.50 = 31,142.00/x
3. Step 3: Cross multiply
   56,633.69x = 78,156.50 × 31,142.00
4. Step 4: Simplify right side
   56,633.69x = 2,433,949,762.68
5. Step 5: Solve for x
   x = 2,433,949,762.68/56,633.69
6. Step 6: Final answer
   x = 42,977.06