Finding the Fourth Proportional to 1,985.86, 2,740.50 and 1,101.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.86 : 2,740.50 = 1,101.72 : x
2. Step 2: Convert to fraction form
   1,985.86/2,740.50 = 1,101.72/x
3. Step 3: Cross multiply
   1,985.86x = 2,740.50 × 1,101.72
4. Step 4: Simplify right side
   1,985.86x = 3,019,263.66
5. Step 5: Solve for x
   x = 3,019,263.66/1,985.86
6. Step 6: Final answer
   x = 1,520.38