Finding the Fourth Proportional to 42,379.62, 63,572.47 and 11,214.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,379.62 : 63,572.47 = 11,214.50 : x
2. Step 2: Convert to fraction form
   42,379.62/63,572.47 = 11,214.50/x
3. Step 3: Cross multiply
   42,379.62x = 63,572.47 × 11,214.50
4. Step 4: Simplify right side
   42,379.62x = 712,933,464.82
5. Step 5: Solve for x
   x = 712,933,464.82/42,379.62
6. Step 6: Final answer
   x = 16,822.55