Finding the Fourth Proportional to 42,362.48, 63,544.17 and 12,780.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,362.48 : 63,544.17 = 12,780.57 : x
2. Step 2: Convert to fraction form
   42,362.48/63,544.17 = 12,780.57/x
3. Step 3: Cross multiply
   42,362.48x = 63,544.17 × 12,780.57
4. Step 4: Simplify right side
   42,362.48x = 812,130,712.78
5. Step 5: Solve for x
   x = 812,130,712.78/42,362.48
6. Step 6: Final answer
   x = 19,170.99