Finding the Fourth Proportional to 1,338.16, 1,845.15 and 1,089.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.16 : 1,845.15 = 1,089.02 : x
2. Step 2: Convert to fraction form
   1,338.16/1,845.15 = 1,089.02/x
3. Step 3: Cross multiply
   1,338.16x = 1,845.15 × 1,089.02
4. Step 4: Simplify right side
   1,338.16x = 2,009,405.25
5. Step 5: Solve for x
   x = 2,009,405.25/1,338.16
6. Step 6: Final answer
   x = 1,501.62