Finding the Fourth Proportional to 1,360.64, 1,873.68 and 1,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.64 : 1,873.68 = 1,010.72 : x
2. Step 2: Convert to fraction form
   1,360.64/1,873.68 = 1,010.72/x
3. Step 3: Cross multiply
   1,360.64x = 1,873.68 × 1,010.72
4. Step 4: Simplify right side
   1,360.64x = 1,893,765.85
5. Step 5: Solve for x
   x = 1,893,765.85/1,360.64
6. Step 6: Final answer
   x = 1,391.82