Finding the Fourth Proportional to 1,190.72, 1,642.91 and 693.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.72 : 1,642.91 = 693.06 : x
2. Step 2: Convert to fraction form
   1,190.72/1,642.91 = 693.06/x
3. Step 3: Cross multiply
   1,190.72x = 1,642.91 × 693.06
4. Step 4: Simplify right side
   1,190.72x = 1,138,637.58
5. Step 5: Solve for x
   x = 1,138,637.58/1,190.72
6. Step 6: Final answer
   x = 956.26