Finding the Fourth Proportional to 1,358.98, 1,875.15 and 854.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.98 : 1,875.15 = 854.55 : x
2. Step 2: Convert to fraction form
   1,358.98/1,875.15 = 854.55/x
3. Step 3: Cross multiply
   1,358.98x = 1,875.15 × 854.55
4. Step 4: Simplify right side
   1,358.98x = 1,602,409.43
5. Step 5: Solve for x
   x = 1,602,409.43/1,358.98
6. Step 6: Final answer
   x = 1,179.13