Finding the Fourth Proportional to 1,375.80, 1,897.96 and 904.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.80 : 1,897.96 = 904.48 : x
2. Step 2: Convert to fraction form
   1,375.80/1,897.96 = 904.48/x
3. Step 3: Cross multiply
   1,375.80x = 1,897.96 × 904.48
4. Step 4: Simplify right side
   1,375.80x = 1,716,666.86
5. Step 5: Solve for x
   x = 1,716,666.86/1,375.80
6. Step 6: Final answer
   x = 1,247.76