Finding the Fourth Proportional to 1,643.42, 2,462.38 and 1,155.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.42 : 2,462.38 = 1,155.60 : x
2. Step 2: Convert to fraction form
   1,643.42/2,462.38 = 1,155.60/x
3. Step 3: Cross multiply
   1,643.42x = 2,462.38 × 1,155.60
4. Step 4: Simplify right side
   1,643.42x = 2,845,526.33
5. Step 5: Solve for x
   x = 2,845,526.33/1,643.42
6. Step 6: Final answer
   x = 1,731.47