Finding the Fourth Proportional to 1,613.88, 2,227.20 and 1,054.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.88 : 2,227.20 = 1,054.71 : x
2. Step 2: Convert to fraction form
   1,613.88/2,227.20 = 1,054.71/x
3. Step 3: Cross multiply
   1,613.88x = 2,227.20 × 1,054.71
4. Step 4: Simplify right side
   1,613.88x = 2,349,050.11
5. Step 5: Solve for x
   x = 2,349,050.11/1,613.88
6. Step 6: Final answer
   x = 1,455.53