Finding the Fourth Proportional to 1,375.05, 1,897.60 and 785.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.05 : 1,897.60 = 785.57 : x
2. Step 2: Convert to fraction form
   1,375.05/1,897.60 = 785.57/x
3. Step 3: Cross multiply
   1,375.05x = 1,897.60 × 785.57
4. Step 4: Simplify right side
   1,375.05x = 1,490,697.63
5. Step 5: Solve for x
   x = 1,490,697.63/1,375.05
6. Step 6: Final answer
   x = 1,084.11