Finding the Fourth Proportional to 1,948.72, 2,922.88 and 1,215.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.72 : 2,922.88 = 1,215.76 : x
2. Step 2: Convert to fraction form
   1,948.72/2,922.88 = 1,215.76/x
3. Step 3: Cross multiply
   1,948.72x = 2,922.88 × 1,215.76
4. Step 4: Simplify right side
   1,948.72x = 3,553,520.59
5. Step 5: Solve for x
   x = 3,553,520.59/1,948.72
6. Step 6: Final answer
   x = 1,823.52