Finding the Fourth Proportional to 1,886.17, 2,603.10 and 1,224.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.17 : 2,603.10 = 1,224.76 : x
2. Step 2: Convert to fraction form
   1,886.17/2,603.10 = 1,224.76/x
3. Step 3: Cross multiply
   1,886.17x = 2,603.10 × 1,224.76
4. Step 4: Simplify right side
   1,886.17x = 3,188,172.76
5. Step 5: Solve for x
   x = 3,188,172.76/1,886.17
6. Step 6: Final answer
   x = 1,690.29