Finding the Fourth Proportional to 42,390.72, 63,597.60 and 14,690.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390.72 : 63,597.60 = 14,690.88 : x
2. Step 2: Convert to fraction form
   42,390.72/63,597.60 = 14,690.88/x
3. Step 3: Cross multiply
   42,390.72x = 63,597.60 × 14,690.88
4. Step 4: Simplify right side
   42,390.72x = 934,304,709.89
5. Step 5: Solve for x
   x = 934,304,709.89/42,390.72
6. Step 6: Final answer
   x = 22,040.31