Finding the Fourth Proportional to 2,907.55, 4,012.34 and 1,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,907.55 : 4,012.34 = 1,648.72 : x
2. Step 2: Convert to fraction form
   2,907.55/4,012.34 = 1,648.72/x
3. Step 3: Cross multiply
   2,907.55x = 4,012.34 × 1,648.72
4. Step 4: Simplify right side
   2,907.55x = 6,615,221.98
5. Step 5: Solve for x
   x = 6,615,221.98/2,907.55
6. Step 6: Final answer
   x = 2,275.18