Finding the Fourth Proportional to 1,980.32, 2,966.70 and 1,200.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.32 : 2,966.70 = 1,200.56 : x
2. Step 2: Convert to fraction form
   1,980.32/2,966.70 = 1,200.56/x
3. Step 3: Cross multiply
   1,980.32x = 2,966.70 × 1,200.56
4. Step 4: Simplify right side
   1,980.32x = 3,561,701.35
5. Step 5: Solve for x
   x = 3,561,701.35/1,980.32
6. Step 6: Final answer
   x = 1,798.55