Finding the Fourth Proportional to 39,853.74, 55,016.42 and 28,376.10

Step by Step Solution

1. Step 1: Write the proportion equation
   39,853.74 : 55,016.42 = 28,376.10 : x
2. Step 2: Convert to fraction form
   39,853.74/55,016.42 = 28,376.10/x
3. Step 3: Cross multiply
   39,853.74x = 55,016.42 × 28,376.10
4. Step 4: Simplify right side
   39,853.74x = 1,561,151,435.56
5. Step 5: Solve for x
   x = 1,561,151,435.56/39,853.74
6. Step 6: Final answer
   x = 39,172.02