Finding the Fourth Proportional to 1,087.30, 1,501.17 and 838.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.30 : 1,501.17 = 838.16 : x
2. Step 2: Convert to fraction form
   1,087.30/1,501.17 = 838.16/x
3. Step 3: Cross multiply
   1,087.30x = 1,501.17 × 838.16
4. Step 4: Simplify right side
   1,087.30x = 1,258,215.63
5. Step 5: Solve for x
   x = 1,258,215.63/1,087.30
6. Step 6: Final answer
   x = 1,157.19