Finding the Fourth Proportional to 1,164.37, 1,606.82 and 666.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.37 : 1,606.82 = 666.98 : x
2. Step 2: Convert to fraction form
   1,164.37/1,606.82 = 666.98/x
3. Step 3: Cross multiply
   1,164.37x = 1,606.82 × 666.98
4. Step 4: Simplify right side
   1,164.37x = 1,071,722.49
5. Step 5: Solve for x
   x = 1,071,722.49/1,164.37
6. Step 6: Final answer
   x = 920.43