Finding the Fourth Proportional to 1,980.86, 2,969.42 and 1,199.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.86 : 2,969.42 = 1,199.88 : x
2. Step 2: Convert to fraction form
   1,980.86/2,969.42 = 1,199.88/x
3. Step 3: Cross multiply
   1,980.86x = 2,969.42 × 1,199.88
4. Step 4: Simplify right side
   1,980.86x = 3,562,941.67
5. Step 5: Solve for x
   x = 3,562,941.67/1,980.86
6. Step 6: Final answer
   x = 1,798.69