Finding the Fourth Proportional to 1,139.02, 1,706.38 and 908.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.02 : 1,706.38 = 908.16 : x
2. Step 2: Convert to fraction form
   1,139.02/1,706.38 = 908.16/x
3. Step 3: Cross multiply
   1,139.02x = 1,706.38 × 908.16
4. Step 4: Simplify right side
   1,139.02x = 1,549,666.06
5. Step 5: Solve for x
   x = 1,549,666.06/1,139.02
6. Step 6: Final answer
   x = 1,360.53