Finding the Fourth Proportional to 31,432.24, 43,384.71 and 19,488.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,432.24 : 43,384.71 = 19,488.79 : x
2. Step 2: Convert to fraction form
   31,432.24/43,384.71 = 19,488.79/x
3. Step 3: Cross multiply
   31,432.24x = 43,384.71 × 19,488.79
4. Step 4: Simplify right side
   31,432.24x = 845,515,502.40
5. Step 5: Solve for x
   x = 845,515,502.40/31,432.24
6. Step 6: Final answer
   x = 26,899.63