Finding the Fourth Proportional to 38,490.48, 53,115.82 and 21,494.25

Step by Step Solution

1. Step 1: Write the proportion equation
   38,490.48 : 53,115.82 = 21,494.25 : x
2. Step 2: Convert to fraction form
   38,490.48/53,115.82 = 21,494.25/x
3. Step 3: Cross multiply
   38,490.48x = 53,115.82 × 21,494.25
4. Step 4: Simplify right side
   38,490.48x = 1,141,684,394.72
5. Step 5: Solve for x
   x = 1,141,684,394.72/38,490.48
6. Step 6: Final answer
   x = 29,661.48