Finding the Fourth Proportional to 1,758.60, 2,428.86 and 1,198.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,758.60 : 2,428.86 = 1,198.09 : x
2. Step 2: Convert to fraction form
   1,758.60/2,428.86 = 1,198.09/x
3. Step 3: Cross multiply
   1,758.60x = 2,428.86 × 1,198.09
4. Step 4: Simplify right side
   1,758.60x = 2,909,986.89
5. Step 5: Solve for x
   x = 2,909,986.89/1,758.60
6. Step 6: Final answer
   x = 1,654.72