Finding the Fourth Proportional to 56,599.50, 78,109.88 and 31,449

Step by Step Solution

1. Step 1: Write the proportion equation
   56,599.50 : 78,109.88 = 31,449 : x
2. Step 2: Convert to fraction form
   56,599.50/78,109.88 = 31,449/x
3. Step 3: Cross multiply
   56,599.50x = 78,109.88 × 31,449
4. Step 4: Simplify right side
   56,599.50x = 2,456,477,458.88
5. Step 5: Solve for x
   x = 2,456,477,458.88/56,599.50
6. Step 6: Final answer
   x = 43,401.05