Finding the Fourth Proportional to 1,181.55, 1,631.72 and 973.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.55 : 1,631.72 = 973.79 : x
2. Step 2: Convert to fraction form
   1,181.55/1,631.72 = 973.79/x
3. Step 3: Cross multiply
   1,181.55x = 1,631.72 × 973.79
4. Step 4: Simplify right side
   1,181.55x = 1,588,939.59
5. Step 5: Solve for x
   x = 1,588,939.59/1,181.55
6. Step 6: Final answer
   x = 1,344.79