Finding the Fourth Proportional to 2,269.71, 3,129.98 and 1,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.71 : 3,129.98 = 1,561.50 : x
2. Step 2: Convert to fraction form
   2,269.71/3,129.98 = 1,561.50/x
3. Step 3: Cross multiply
   2,269.71x = 3,129.98 × 1,561.50
4. Step 4: Simplify right side
   2,269.71x = 4,887,455.96
5. Step 5: Solve for x
   x = 4,887,455.96/2,269.71
6. Step 6: Final answer
   x = 2,153.34