Finding the Fourth Proportional to 56,602.85, 78,112.64 and 31,112.00

Step by Step Solution

1. Step 1: Write the proportion equation
   56,602.85 : 78,112.64 = 31,112.00 : x
2. Step 2: Convert to fraction form
   56,602.85/78,112.64 = 31,112.00/x
3. Step 3: Cross multiply
   56,602.85x = 78,112.64 × 31,112.00
4. Step 4: Simplify right side
   56,602.85x = 2,430,239,909.56
5. Step 5: Solve for x
   x = 2,430,239,909.56/56,602.85
6. Step 6: Final answer
   x = 42,934.94