Finding the Fourth Proportional to 1,865.31, 2,573.28 and 1,267.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.31 : 2,573.28 = 1,267.07 : x
2. Step 2: Convert to fraction form
   1,865.31/2,573.28 = 1,267.07/x
3. Step 3: Cross multiply
   1,865.31x = 2,573.28 × 1,267.07
4. Step 4: Simplify right side
   1,865.31x = 3,260,513.02
5. Step 5: Solve for x
   x = 3,260,513.02/1,865.31
6. Step 6: Final answer
   x = 1,747.98