Finding the Fourth Proportional to 31,267.86, 43,153.83 and 18,520.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,267.86 : 43,153.83 = 18,520.05 : x
2. Step 2: Convert to fraction form
   31,267.86/43,153.83 = 18,520.05/x
3. Step 3: Cross multiply
   31,267.86x = 43,153.83 × 18,520.05
4. Step 4: Simplify right side
   31,267.86x = 799,211,089.29
5. Step 5: Solve for x
   x = 799,211,089.29/31,267.86
6. Step 6: Final answer
   x = 25,560.15