Finding the Fourth Proportional to 1,196.61, 1,795.10 and 648.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.61 : 1,795.10 = 648.87 : x
2. Step 2: Convert to fraction form
   1,196.61/1,795.10 = 648.87/x
3. Step 3: Cross multiply
   1,196.61x = 1,795.10 × 648.87
4. Step 4: Simplify right side
   1,196.61x = 1,164,783.29
5. Step 5: Solve for x
   x = 1,164,783.29/1,196.61
6. Step 6: Final answer
   x = 973.40