Finding the Fourth Proportional to 1,686.47, 2,328.76 and 1,058.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.47 : 2,328.76 = 1,058.05 : x
2. Step 2: Convert to fraction form
   1,686.47/2,328.76 = 1,058.05/x
3. Step 3: Cross multiply
   1,686.47x = 2,328.76 × 1,058.05
4. Step 4: Simplify right side
   1,686.47x = 2,463,944.52
5. Step 5: Solve for x
   x = 2,463,944.52/1,686.47
6. Step 6: Final answer
   x = 1,461.01