Finding the Fourth Proportional to 1,371.60, 1,893.15 and 1,105.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.60 : 1,893.15 = 1,105.02 : x
2. Step 2: Convert to fraction form
   1,371.60/1,893.15 = 1,105.02/x
3. Step 3: Cross multiply
   1,371.60x = 1,893.15 × 1,105.02
4. Step 4: Simplify right side
   1,371.60x = 2,091,968.61
5. Step 5: Solve for x
   x = 2,091,968.61/1,371.60
6. Step 6: Final answer
   x = 1,525.20