Finding the Fourth Proportional to 2,223.63, 3,069.72 and 1,384.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.63 : 3,069.72 = 1,384.61 : x
2. Step 2: Convert to fraction form
   2,223.63/3,069.72 = 1,384.61/x
3. Step 3: Cross multiply
   2,223.63x = 3,069.72 × 1,384.61
4. Step 4: Simplify right side
   2,223.63x = 4,250,349.66
5. Step 5: Solve for x
   x = 4,250,349.66/2,223.63
6. Step 6: Final answer
   x = 1,911.45