Finding the Fourth Proportional to 1,899.34, 2,620.90 and 1,113.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.34 : 2,620.90 = 1,113.37 : x
2. Step 2: Convert to fraction form
   1,899.34/2,620.90 = 1,113.37/x
3. Step 3: Cross multiply
   1,899.34x = 2,620.90 × 1,113.37
4. Step 4: Simplify right side
   1,899.34x = 2,918,031.43
5. Step 5: Solve for x
   x = 2,918,031.43/1,899.34
6. Step 6: Final answer
   x = 1,536.34