Finding the Fourth Proportional to 1,751.56, 2,417.06 and 1,005.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,751.56 : 2,417.06 = 1,005.78 : x
2. Step 2: Convert to fraction form
   1,751.56/2,417.06 = 1,005.78/x
3. Step 3: Cross multiply
   1,751.56x = 2,417.06 × 1,005.78
4. Step 4: Simplify right side
   1,751.56x = 2,431,030.61
5. Step 5: Solve for x
   x = 2,431,030.61/1,751.56
6. Step 6: Final answer
   x = 1,387.93