Finding the Fourth Proportional to 1,646.51, 2,272.06 and 900.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.51 : 2,272.06 = 900.31 : x
2. Step 2: Convert to fraction form
   1,646.51/2,272.06 = 900.31/x
3. Step 3: Cross multiply
   1,646.51x = 2,272.06 × 900.31
4. Step 4: Simplify right side
   1,646.51x = 2,045,558.34
5. Step 5: Solve for x
   x = 2,045,558.34/1,646.51
6. Step 6: Final answer
   x = 1,242.36