Finding the Fourth Proportional to 22,503.12, 31,011.72 and 18,499.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,503.12 : 31,011.72 = 18,499.92 : x
2. Step 2: Convert to fraction form
   22,503.12/31,011.72 = 18,499.92/x
3. Step 3: Cross multiply
   22,503.12x = 31,011.72 × 18,499.92
4. Step 4: Simplify right side
   22,503.12x = 573,714,339.06
5. Step 5: Solve for x
   x = 573,714,339.06/22,503.12
6. Step 6: Final answer
   x = 25,494.88