Finding the Fourth Proportional to 38,124.30, 52,610.00 and 21,128.79

Step by Step Solution

1. Step 1: Write the proportion equation
   38,124.30 : 52,610.00 = 21,128.79 : x
2. Step 2: Convert to fraction form
   38,124.30/52,610.00 = 21,128.79/x
3. Step 3: Cross multiply
   38,124.30x = 52,610.00 × 21,128.79
4. Step 4: Simplify right side
   38,124.30x = 1,111,585,536.26
5. Step 5: Solve for x
   x = 1,111,585,536.26/38,124.30
6. Step 6: Final answer
   x = 29,156.88