Finding the Fourth Proportional to 1,098.90, 1,647.72 and 368.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.90 : 1,647.72 = 368.06 : x
2. Step 2: Convert to fraction form
   1,098.90/1,647.72 = 368.06/x
3. Step 3: Cross multiply
   1,098.90x = 1,647.72 × 368.06
4. Step 4: Simplify right side
   1,098.90x = 606,459.82
5. Step 5: Solve for x
   x = 606,459.82/1,098.90
6. Step 6: Final answer
   x = 551.88