Finding the Fourth Proportional to 1,751.76, 2,417.40 and 1,005.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,751.76 : 2,417.40 = 1,005.72 : x
2. Step 2: Convert to fraction form
   1,751.76/2,417.40 = 1,005.72/x
3. Step 3: Cross multiply
   1,751.76x = 2,417.40 × 1,005.72
4. Step 4: Simplify right side
   1,751.76x = 2,431,227.53
5. Step 5: Solve for x
   x = 2,431,227.53/1,751.76
6. Step 6: Final answer
   x = 1,387.88