Finding the Fourth Proportional to 28,139.97, 42,222.93 and 14,298.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28,139.97 : 42,222.93 = 14,298.69 : x
2. Step 2: Convert to fraction form
   28,139.97/42,222.93 = 14,298.69/x
3. Step 3: Cross multiply
   28,139.97x = 42,222.93 × 14,298.69
4. Step 4: Simplify right side
   28,139.97x = 603,732,586.96
5. Step 5: Solve for x
   x = 603,732,586.96/28,139.97
6. Step 6: Final answer
   x = 21,454.63