Finding the Fourth Proportional to 1,899.42, 2,620.47 and 1,113.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.42 : 2,620.47 = 1,113.18 : x
2. Step 2: Convert to fraction form
   1,899.42/2,620.47 = 1,113.18/x
3. Step 3: Cross multiply
   1,899.42x = 2,620.47 × 1,113.18
4. Step 4: Simplify right side
   1,899.42x = 2,917,054.79
5. Step 5: Solve for x
   x = 2,917,054.79/1,899.42
6. Step 6: Final answer
   x = 1,535.76