Finding the Fourth Proportional to 1,945.38, 2,915.47 and 1,066.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.38 : 2,915.47 = 1,066.55 : x
2. Step 2: Convert to fraction form
   1,945.38/2,915.47 = 1,066.55/x
3. Step 3: Cross multiply
   1,945.38x = 2,915.47 × 1,066.55
4. Step 4: Simplify right side
   1,945.38x = 3,109,494.53
5. Step 5: Solve for x
   x = 3,109,494.53/1,945.38
6. Step 6: Final answer
   x = 1,598.40