Finding the Fourth Proportional to 12,991.55, 19,479.53 and 5,962.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,991.55 : 19,479.53 = 5,962.77 : x
2. Step 2: Convert to fraction form
   12,991.55/19,479.53 = 5,962.77/x
3. Step 3: Cross multiply
   12,991.55x = 19,479.53 × 5,962.77
4. Step 4: Simplify right side
   12,991.55x = 116,151,972.01
5. Step 5: Solve for x
   x = 116,151,972.01/12,991.55
6. Step 6: Final answer
   x = 8,940.58