Finding the Fourth Proportional to 2,312.50, 3,469.63 and 1,388.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.50 : 3,469.63 = 1,388.71 : x
2. Step 2: Convert to fraction form
   2,312.50/3,469.63 = 1,388.71/x
3. Step 3: Cross multiply
   2,312.50x = 3,469.63 × 1,388.71
4. Step 4: Simplify right side
   2,312.50x = 4,818,285.59
5. Step 5: Solve for x
   x = 4,818,285.59/2,312.50
6. Step 6: Final answer
   x = 2,083.58