Finding the Fourth Proportional to 1,172.30, 1,618.09 and 675.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.30 : 1,618.09 = 675.10 : x
2. Step 2: Convert to fraction form
   1,172.30/1,618.09 = 675.10/x
3. Step 3: Cross multiply
   1,172.30x = 1,618.09 × 675.10
4. Step 4: Simplify right side
   1,172.30x = 1,092,372.56
5. Step 5: Solve for x
   x = 1,092,372.56/1,172.30
6. Step 6: Final answer
   x = 931.82