Finding the Fourth Proportional to 1,357.16, 1,870.70 and 1,108.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.16 : 1,870.70 = 1,108.04 : x
2. Step 2: Convert to fraction form
   1,357.16/1,870.70 = 1,108.04/x
3. Step 3: Cross multiply
   1,357.16x = 1,870.70 × 1,108.04
4. Step 4: Simplify right side
   1,357.16x = 2,072,795.53
5. Step 5: Solve for x
   x = 2,072,795.53/1,357.16
6. Step 6: Final answer
   x = 1,527.31