Finding the Fourth Proportional to 1,008.33, 1,390.62 and 654.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.33 : 1,390.62 = 654.12 : x
2. Step 2: Convert to fraction form
   1,008.33/1,390.62 = 654.12/x
3. Step 3: Cross multiply
   1,008.33x = 1,390.62 × 654.12
4. Step 4: Simplify right side
   1,008.33x = 909,629.08
5. Step 5: Solve for x
   x = 909,629.08/1,008.33
6. Step 6: Final answer
   x = 902.12