Finding the Fourth Proportional to 1,345.59, 1,858.02 and 1,276.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.59 : 1,858.02 = 1,276.79 : x
2. Step 2: Convert to fraction form
   1,345.59/1,858.02 = 1,276.79/x
3. Step 3: Cross multiply
   1,345.59x = 1,858.02 × 1,276.79
4. Step 4: Simplify right side
   1,345.59x = 2,372,304.91
5. Step 5: Solve for x
   x = 2,372,304.91/1,345.59
6. Step 6: Final answer
   x = 1,763.02