Finding the Fourth Proportional to 1,164.86, 1,607.52 and 667.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.86 : 1,607.52 = 667.47 : x
2. Step 2: Convert to fraction form
   1,164.86/1,607.52 = 667.47/x
3. Step 3: Cross multiply
   1,164.86x = 1,607.52 × 667.47
4. Step 4: Simplify right side
   1,164.86x = 1,072,971.37
5. Step 5: Solve for x
   x = 1,072,971.37/1,164.86
6. Step 6: Final answer
   x = 921.12