Finding the Fourth Proportional to 2,848.56, 4,272.86 and 999.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,848.56 : 4,272.86 = 999.72 : x
2. Step 2: Convert to fraction form
   2,848.56/4,272.86 = 999.72/x
3. Step 3: Cross multiply
   2,848.56x = 4,272.86 × 999.72
4. Step 4: Simplify right side
   2,848.56x = 4,271,642.23
5. Step 5: Solve for x
   x = 4,271,642.23/2,848.56
6. Step 6: Final answer
   x = 1,499.58