Finding the Fourth Proportional to 1,547.72, 2,139.91 and 1,478.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,547.72 : 2,139.91 = 1,478.87 : x
2. Step 2: Convert to fraction form
   1,547.72/2,139.91 = 1,478.87/x
3. Step 3: Cross multiply
   1,547.72x = 2,139.91 × 1,478.87
4. Step 4: Simplify right side
   1,547.72x = 3,164,642.33
5. Step 5: Solve for x
   x = 3,164,642.33/1,547.72
6. Step 6: Final answer
   x = 2,044.71