Finding the Fourth Proportional to 1,858.88, 2,566.06 and 1,229.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.88 : 2,566.06 = 1,229.72 : x
2. Step 2: Convert to fraction form
   1,858.88/2,566.06 = 1,229.72/x
3. Step 3: Cross multiply
   1,858.88x = 2,566.06 × 1,229.72
4. Step 4: Simplify right side
   1,858.88x = 3,155,519.40
5. Step 5: Solve for x
   x = 3,155,519.40/1,858.88
6. Step 6: Final answer
   x = 1,697.54