Finding the Fourth Proportional to 1,326.04, 1,987.86 and 556.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,326.04 : 1,987.86 = 556.12 : x
2. Step 2: Convert to fraction form
   1,326.04/1,987.86 = 556.12/x
3. Step 3: Cross multiply
   1,326.04x = 1,987.86 × 556.12
4. Step 4: Simplify right side
   1,326.04x = 1,105,488.70
5. Step 5: Solve for x
   x = 1,105,488.70/1,326.04
6. Step 6: Final answer
   x = 833.68