Finding the Fourth Proportional to 1,870.32, 2,806.02 and 571.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.32 : 2,806.02 = 571.98 : x
2. Step 2: Convert to fraction form
   1,870.32/2,806.02 = 571.98/x
3. Step 3: Cross multiply
   1,870.32x = 2,806.02 × 571.98
4. Step 4: Simplify right side
   1,870.32x = 1,604,987.32
5. Step 5: Solve for x
   x = 1,604,987.32/1,870.32
6. Step 6: Final answer
   x = 858.14