Finding the Fourth Proportional to 57,116.77, 78,818.56 and 31,621.34

Step by Step Solution

1. Step 1: Write the proportion equation
   57,116.77 : 78,818.56 = 31,621.34 : x
2. Step 2: Convert to fraction form
   57,116.77/78,818.56 = 31,621.34/x
3. Step 3: Cross multiply
   57,116.77x = 78,818.56 × 31,621.34
4. Step 4: Simplify right side
   57,116.77x = 2,492,348,484.07
5. Step 5: Solve for x
   x = 2,492,348,484.07/57,116.77
6. Step 6: Final answer
   x = 43,636.02