Finding the Fourth Proportional to 21,026.91, 31,406.32 and 19,022.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,026.91 : 31,406.32 = 19,022.52 : x
2. Step 2: Convert to fraction form
   21,026.91/31,406.32 = 19,022.52/x
3. Step 3: Cross multiply
   21,026.91x = 31,406.32 × 19,022.52
4. Step 4: Simplify right side
   21,026.91x = 597,427,376.80
5. Step 5: Solve for x
   x = 597,427,376.80/21,026.91
6. Step 6: Final answer
   x = 28,412.52