Finding the Fourth Proportional to 1,375.10, 1,897.40 and 777.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.10 : 1,897.40 = 777.32 : x
2. Step 2: Convert to fraction form
   1,375.10/1,897.40 = 777.32/x
3. Step 3: Cross multiply
   1,375.10x = 1,897.40 × 777.32
4. Step 4: Simplify right side
   1,375.10x = 1,474,873.59
5. Step 5: Solve for x
   x = 1,474,873.59/1,375.10
6. Step 6: Final answer
   x = 1,072.56