Finding the Fourth Proportional to 1,532.10, 2,111.61 and 1,199.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,532.10 : 2,111.61 = 1,199.79 : x
2. Step 2: Convert to fraction form
   1,532.10/2,111.61 = 1,199.79/x
3. Step 3: Cross multiply
   1,532.10x = 2,111.61 × 1,199.79
4. Step 4: Simplify right side
   1,532.10x = 2,533,488.56
5. Step 5: Solve for x
   x = 2,533,488.56/1,532.10
6. Step 6: Final answer
   x = 1,653.61