Finding the Fourth Proportional to 1,899.59, 2,621.25 and 1,113.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.59 : 2,621.25 = 1,113.62 : x
2. Step 2: Convert to fraction form
   1,899.59/2,621.25 = 1,113.62/x
3. Step 3: Cross multiply
   1,899.59x = 2,621.25 × 1,113.62
4. Step 4: Simplify right side
   1,899.59x = 2,919,063.32
5. Step 5: Solve for x
   x = 2,919,063.32/1,899.59
6. Step 6: Final answer
   x = 1,536.68