Finding the Fourth Proportional to 42,015.36, 63,026.56 and 10,851.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,015.36 : 63,026.56 = 10,851.20 : x
2. Step 2: Convert to fraction form
   42,015.36/63,026.56 = 10,851.20/x
3. Step 3: Cross multiply
   42,015.36x = 63,026.56 × 10,851.20
4. Step 4: Simplify right side
   42,015.36x = 683,913,807.87
5. Step 5: Solve for x
   x = 683,913,807.87/42,015.36
6. Step 6: Final answer
   x = 16,277.71