Finding the Fourth Proportional to 12,777.12, 19,173.06 and 5,381.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.12 : 19,173.06 = 5,381.10 : x
2. Step 2: Convert to fraction form
   12,777.12/19,173.06 = 5,381.10/x
3. Step 3: Cross multiply
   12,777.12x = 19,173.06 × 5,381.10
4. Step 4: Simplify right side
   12,777.12x = 103,172,153.17
5. Step 5: Solve for x
   x = 103,172,153.17/12,777.12
6. Step 6: Final answer
   x = 8,074.76