Finding the Fourth Proportional to 2,011.52, 2,776.50 and 1,172.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.52 : 2,776.50 = 1,172.42 : x
2. Step 2: Convert to fraction form
   2,011.52/2,776.50 = 1,172.42/x
3. Step 3: Cross multiply
   2,011.52x = 2,776.50 × 1,172.42
4. Step 4: Simplify right side
   2,011.52x = 3,255,224.13
5. Step 5: Solve for x
   x = 3,255,224.13/2,011.52
6. Step 6: Final answer
   x = 1,618.29