Finding the Fourth Proportional to 42,390.10, 63,585.09 and 17,443.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390.10 : 63,585.09 = 17,443.72 : x
2. Step 2: Convert to fraction form
   42,390.10/63,585.09 = 17,443.72/x
3. Step 3: Cross multiply
   42,390.10x = 63,585.09 × 17,443.72
4. Step 4: Simplify right side
   42,390.10x = 1,109,160,506.13
5. Step 5: Solve for x
   x = 1,109,160,506.13/42,390.10
6. Step 6: Final answer
   x = 26,165.56