Finding the Third Proportional to 12,870.56 and 19,192.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.56 : 19,192.78 = 19,192.78 : x
2. Step 2: Convert to fraction form
   12,870.56/19,192.78 = 19,192.78/x
3. Step 3: Cross multiply
   12,870.56x = 19,192.78 × 19,192.78
4. Step 4: Simplify right side
   12,870.56x = 368,362,852.11
5. Step 5: Solve for x
   x = 368,362,852.11/12,870.56
6. Step 6: Final answer
   x = 28,620.57