Finding the Fourth Proportional to 1,375.68, 1,898.35 and 786.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.68 : 1,898.35 = 786.12 : x
2. Step 2: Convert to fraction form
   1,375.68/1,898.35 = 786.12/x
3. Step 3: Cross multiply
   1,375.68x = 1,898.35 × 786.12
4. Step 4: Simplify right side
   1,375.68x = 1,492,330.90
5. Step 5: Solve for x
   x = 1,492,330.90/1,375.68
6. Step 6: Final answer
   x = 1,084.80