Finding the Fourth Proportional to 1,188.86, 1,641.98 and 968.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.86 : 1,641.98 = 968.94 : x
2. Step 2: Convert to fraction form
   1,188.86/1,641.98 = 968.94/x
3. Step 3: Cross multiply
   1,188.86x = 1,641.98 × 968.94
4. Step 4: Simplify right side
   1,188.86x = 1,590,980.10
5. Step 5: Solve for x
   x = 1,590,980.10/1,188.86
6. Step 6: Final answer
   x = 1,338.24