Finding the Fourth Proportional to 1,375.51, 1,897.81 and 1,079.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.51 : 1,897.81 = 1,079.86 : x
2. Step 2: Convert to fraction form
   1,375.51/1,897.81 = 1,079.86/x
3. Step 3: Cross multiply
   1,375.51x = 1,897.81 × 1,079.86
4. Step 4: Simplify right side
   1,375.51x = 2,049,369.11
5. Step 5: Solve for x
   x = 2,049,369.11/1,375.51
6. Step 6: Final answer
   x = 1,489.90