Finding the Fourth Proportional to 1,892.19, 2,613.42 and 1,261.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.19 : 2,613.42 = 1,261.69 : x
2. Step 2: Convert to fraction form
   1,892.19/2,613.42 = 1,261.69/x
3. Step 3: Cross multiply
   1,892.19x = 2,613.42 × 1,261.69
4. Step 4: Simplify right side
   1,892.19x = 3,297,319.35
5. Step 5: Solve for x
   x = 3,297,319.35/1,892.19
6. Step 6: Final answer
   x = 1,742.59