Finding the Fourth Proportional to 1,601.98, 2,200.67 and 1,405.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.98 : 2,200.67 = 1,405.15 : x
2. Step 2: Convert to fraction form
   1,601.98/2,200.67 = 1,405.15/x
3. Step 3: Cross multiply
   1,601.98x = 2,200.67 × 1,405.15
4. Step 4: Simplify right side
   1,601.98x = 3,092,264.19
5. Step 5: Solve for x
   x = 3,092,264.19/1,601.98
6. Step 6: Final answer
   x = 1,930.28