Finding the Fourth Proportional to 1,985.63, 2,740.17 and 1,101.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.63 : 2,740.17 = 1,101.57 : x
2. Step 2: Convert to fraction form
   1,985.63/2,740.17 = 1,101.57/x
3. Step 3: Cross multiply
   1,985.63x = 2,740.17 × 1,101.57
4. Step 4: Simplify right side
   1,985.63x = 3,018,489.07
5. Step 5: Solve for x
   x = 3,018,489.07/1,985.63
6. Step 6: Final answer
   x = 1,520.17