Finding the Fourth Proportional to 1,672.72, 2,307.30 and 1,175.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.72 : 2,307.30 = 1,175.32 : x
2. Step 2: Convert to fraction form
   1,672.72/2,307.30 = 1,175.32/x
3. Step 3: Cross multiply
   1,672.72x = 2,307.30 × 1,175.32
4. Step 4: Simplify right side
   1,672.72x = 2,711,815.84
5. Step 5: Solve for x
   x = 2,711,815.84/1,672.72
6. Step 6: Final answer
   x = 1,621.20