Finding the Fourth Proportional to 1,179.90, 1,628.73 and 900.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.90 : 1,628.73 = 900.18 : x
2. Step 2: Convert to fraction form
   1,179.90/1,628.73 = 900.18/x
3. Step 3: Cross multiply
   1,179.90x = 1,628.73 × 900.18
4. Step 4: Simplify right side
   1,179.90x = 1,466,150.17
5. Step 5: Solve for x
   x = 1,466,150.17/1,179.90
6. Step 6: Final answer
   x = 1,242.61