Finding the Fourth Proportional to 1,602.18, 2,210.61 and 903.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,602.18 : 2,210.61 = 903.55 : x
2. Step 2: Convert to fraction form
   1,602.18/2,210.61 = 903.55/x
3. Step 3: Cross multiply
   1,602.18x = 2,210.61 × 903.55
4. Step 4: Simplify right side
   1,602.18x = 1,997,396.67
5. Step 5: Solve for x
   x = 1,997,396.67/1,602.18
6. Step 6: Final answer
   x = 1,246.67