Finding the Fourth Proportional to 38,488.31, 53,113.29 and 21,492.82

Step by Step Solution

1. Step 1: Write the proportion equation
   38,488.31 : 53,113.29 = 21,492.82 : x
2. Step 2: Convert to fraction form
   38,488.31/53,113.29 = 21,492.82/x
3. Step 3: Cross multiply
   38,488.31x = 53,113.29 × 21,492.82
4. Step 4: Simplify right side
   38,488.31x = 1,141,554,399.34
5. Step 5: Solve for x
   x = 1,141,554,399.34/38,488.31
6. Step 6: Final answer
   x = 29,659.77