Finding the Fourth Proportional to 39,061.06, 53,900.40 and 21,830.24

Step by Step Solution

1. Step 1: Write the proportion equation
   39,061.06 : 53,900.40 = 21,830.24 : x
2. Step 2: Convert to fraction form
   39,061.06/53,900.40 = 21,830.24/x
3. Step 3: Cross multiply
   39,061.06x = 53,900.40 × 21,830.24
4. Step 4: Simplify right side
   39,061.06x = 1,176,658,668.10
5. Step 5: Solve for x
   x = 1,176,658,668.10/39,061.06
6. Step 6: Final answer
   x = 30,123.57