Finding the Fourth Proportional to 1,602.71, 2,211.72 and 904.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,602.71 : 2,211.72 = 904.09 : x
2. Step 2: Convert to fraction form
   1,602.71/2,211.72 = 904.09/x
3. Step 3: Cross multiply
   1,602.71x = 2,211.72 × 904.09
4. Step 4: Simplify right side
   1,602.71x = 1,999,593.93
5. Step 5: Solve for x
   x = 1,999,593.93/1,602.71
6. Step 6: Final answer
   x = 1,247.63