Finding the Fourth Proportional to 28,308.96, 42,438.24 and 14,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,308.96 : 42,438.24 = 14,250.72 : x
2. Step 2: Convert to fraction form
   28,308.96/42,438.24 = 14,250.72/x
3. Step 3: Cross multiply
   28,308.96x = 42,438.24 × 14,250.72
4. Step 4: Simplify right side
   28,308.96x = 604,775,475.53
5. Step 5: Solve for x
   x = 604,775,475.53/28,308.96
6. Step 6: Final answer
   x = 21,363.39