Finding the Fourth Proportional to 38,150.72, 52,648.80 and 21,389.12

Step by Step Solution

1. Step 1: Write the proportion equation
   38,150.72 : 52,648.80 = 21,389.12 : x
2. Step 2: Convert to fraction form
   38,150.72/52,648.80 = 21,389.12/x
3. Step 3: Cross multiply
   38,150.72x = 52,648.80 × 21,389.12
4. Step 4: Simplify right side
   38,150.72x = 1,126,111,501.06
5. Step 5: Solve for x
   x = 1,126,111,501.06/38,150.72
6. Step 6: Final answer
   x = 29,517.44