Finding the Fourth Proportional to 1,488.71, 2,222.22 and 1,378.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.71 : 2,222.22 = 1,378.91 : x
2. Step 2: Convert to fraction form
   1,488.71/2,222.22 = 1,378.91/x
3. Step 3: Cross multiply
   1,488.71x = 2,222.22 × 1,378.91
4. Step 4: Simplify right side
   1,488.71x = 3,064,244.83
5. Step 5: Solve for x
   x = 3,064,244.83/1,488.71
6. Step 6: Final answer
   x = 2,058.32