Finding the Fourth Proportional to 1,375.72, 1,897.94 and 786.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.72 : 1,897.94 = 786.12 : x
2. Step 2: Convert to fraction form
   1,375.72/1,897.94 = 786.12/x
3. Step 3: Cross multiply
   1,375.72x = 1,897.94 × 786.12
4. Step 4: Simplify right side
   1,375.72x = 1,492,008.59
5. Step 5: Solve for x
   x = 1,492,008.59/1,375.72
6. Step 6: Final answer
   x = 1,084.53