Finding the Fourth Proportional to 1,380.16, 1,904.64 and 848.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.16 : 1,904.64 = 848.83 : x
2. Step 2: Convert to fraction form
   1,380.16/1,904.64 = 848.83/x
3. Step 3: Cross multiply
   1,380.16x = 1,904.64 × 848.83
4. Step 4: Simplify right side
   1,380.16x = 1,616,715.57
5. Step 5: Solve for x
   x = 1,616,715.57/1,380.16
6. Step 6: Final answer
   x = 1,171.40