Finding the Fourth Proportional to 1,488.32, 2,053.62 and 858.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.32 : 2,053.62 = 858.76 : x
2. Step 2: Convert to fraction form
   1,488.32/2,053.62 = 858.76/x
3. Step 3: Cross multiply
   1,488.32x = 2,053.62 × 858.76
4. Step 4: Simplify right side
   1,488.32x = 1,763,566.71
5. Step 5: Solve for x
   x = 1,763,566.71/1,488.32
6. Step 6: Final answer
   x = 1,184.94