Finding the Fourth Proportional to 12,796.56, 19,071.54 and 12,777.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.56 : 19,071.54 = 12,777.12 : x
2. Step 2: Convert to fraction form
   12,796.56/19,071.54 = 12,777.12/x
3. Step 3: Cross multiply
   12,796.56x = 19,071.54 × 12,777.12
4. Step 4: Simplify right side
   12,796.56x = 243,679,355.16
5. Step 5: Solve for x
   x = 243,679,355.16/12,796.56
6. Step 6: Final answer
   x = 19,042.57