Finding the Fourth Proportional to 28,125.56, 42,199.98 and 12,322.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,125.56 : 42,199.98 = 12,322.42 : x
2. Step 2: Convert to fraction form
   28,125.56/42,199.98 = 12,322.42/x
3. Step 3: Cross multiply
   28,125.56x = 42,199.98 × 12,322.42
4. Step 4: Simplify right side
   28,125.56x = 520,005,877.55
5. Step 5: Solve for x
   x = 520,005,877.55/28,125.56
6. Step 6: Final answer
   x = 18,488.73