Finding the Fourth Proportional to 1,897.80, 2,845.52 and 801.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.80 : 2,845.52 = 801.60 : x
2. Step 2: Convert to fraction form
   1,897.80/2,845.52 = 801.60/x
3. Step 3: Cross multiply
   1,897.80x = 2,845.52 × 801.60
4. Step 4: Simplify right side
   1,897.80x = 2,280,968.83
5. Step 5: Solve for x
   x = 2,280,968.83/1,897.80
6. Step 6: Final answer
   x = 1,201.90