Finding the Fourth Proportional to 1,606.05, 2,216.40 and 907.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.05 : 2,216.40 = 907.47 : x
2. Step 2: Convert to fraction form
   1,606.05/2,216.40 = 907.47/x
3. Step 3: Cross multiply
   1,606.05x = 2,216.40 × 907.47
4. Step 4: Simplify right side
   1,606.05x = 2,011,300.89
5. Step 5: Solve for x
   x = 2,011,300.89/1,606.05
6. Step 6: Final answer
   x = 1,252.33