Finding the Fourth Proportional to 1,117.50, 1,672.10 and 704.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.50 : 1,672.10 = 704.72 : x
2. Step 2: Convert to fraction form
   1,117.50/1,672.10 = 704.72/x
3. Step 3: Cross multiply
   1,117.50x = 1,672.10 × 704.72
4. Step 4: Simplify right side
   1,117.50x = 1,178,362.31
5. Step 5: Solve for x
   x = 1,178,362.31/1,117.50
6. Step 6: Final answer
   x = 1,054.46