Finding the Fourth Proportional to 1,606.21, 2,216.55 and 907.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.21 : 2,216.55 = 907.59 : x
2. Step 2: Convert to fraction form
   1,606.21/2,216.55 = 907.59/x
3. Step 3: Cross multiply
   1,606.21x = 2,216.55 × 907.59
4. Step 4: Simplify right side
   1,606.21x = 2,011,718.61
5. Step 5: Solve for x
   x = 2,011,718.61/1,606.21
6. Step 6: Final answer
   x = 1,252.46