Finding the Fourth Proportional to 56,608.85, 78,120.93 and 31,118.00

Step by Step Solution

1. Step 1: Write the proportion equation
   56,608.85 : 78,120.93 = 31,118.00 : x
2. Step 2: Convert to fraction form
   56,608.85/78,120.93 = 31,118.00/x
3. Step 3: Cross multiply
   56,608.85x = 78,120.93 × 31,118.00
4. Step 4: Simplify right side
   56,608.85x = 2,430,966,709.14
5. Step 5: Solve for x
   x = 2,430,966,709.14/56,608.85
6. Step 6: Final answer
   x = 42,943.23