Finding the Fourth Proportional to 56,607.63, 78,118.70 and 31,116.61

Step by Step Solution

1. Step 1: Write the proportion equation
   56,607.63 : 78,118.70 = 31,116.61 : x
2. Step 2: Convert to fraction form
   56,607.63/78,118.70 = 31,116.61/x
3. Step 3: Cross multiply
   56,607.63x = 78,118.70 × 31,116.61
4. Step 4: Simplify right side
   56,607.63x = 2,430,788,624.25
5. Step 5: Solve for x
   x = 2,430,788,624.25/56,607.63
6. Step 6: Final answer
   x = 42,941.01