Finding the Fourth Proportional to 3,541.86, 5,306.45 and 1,980.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,541.86 : 5,306.45 = 1,980.05 : x
2. Step 2: Convert to fraction form
   3,541.86/5,306.45 = 1,980.05/x
3. Step 3: Cross multiply
   3,541.86x = 5,306.45 × 1,980.05
4. Step 4: Simplify right side
   3,541.86x = 10,506,999.89
5. Step 5: Solve for x
   x = 10,506,999.89/3,541.86
6. Step 6: Final answer
   x = 2,966.52