Finding the Fourth Proportional to 1,752.10, 2,417.72 and 1,005.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,752.10 : 2,417.72 = 1,005.91 : x
2. Step 2: Convert to fraction form
   1,752.10/2,417.72 = 1,005.91/x
3. Step 3: Cross multiply
   1,752.10x = 2,417.72 × 1,005.91
4. Step 4: Simplify right side
   1,752.10x = 2,431,997.65
5. Step 5: Solve for x
   x = 2,431,997.65/1,752.10
6. Step 6: Final answer
   x = 1,388.05