Finding the Fourth Proportional to 42,432.30, 63,601.97 and 21,338.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,432.30 : 63,601.97 = 21,338.69 : x
2. Step 2: Convert to fraction form
   42,432.30/63,601.97 = 21,338.69/x
3. Step 3: Cross multiply
   42,432.30x = 63,601.97 × 21,338.69
4. Step 4: Simplify right side
   42,432.30x = 1,357,182,296.52
5. Step 5: Solve for x
   x = 1,357,182,296.52/42,432.30
6. Step 6: Final answer
   x = 31,984.65