Finding the Fourth Proportional to 1,516.10, 2,091.72 and 1,235.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,516.10 : 2,091.72 = 1,235.86 : x
2. Step 2: Convert to fraction form
   1,516.10/2,091.72 = 1,235.86/x
3. Step 3: Cross multiply
   1,516.10x = 2,091.72 × 1,235.86
4. Step 4: Simplify right side
   1,516.10x = 2,585,056.44
5. Step 5: Solve for x
   x = 2,585,056.44/1,516.10
6. Step 6: Final answer
   x = 1,705.07