Finding the Fourth Proportional to 1,897.78, 2,619.40 and 1,373.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.78 : 2,619.40 = 1,373.72 : x
2. Step 2: Convert to fraction form
   1,897.78/2,619.40 = 1,373.72/x
3. Step 3: Cross multiply
   1,897.78x = 2,619.40 × 1,373.72
4. Step 4: Simplify right side
   1,897.78x = 3,598,322.17
5. Step 5: Solve for x
   x = 3,598,322.17/1,897.78
6. Step 6: Final answer
   x = 1,896.07