Finding the Fourth Proportional to 42,798.18, 64,212.45 and 19,103.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,798.18 : 64,212.45 = 19,103.56 : x
2. Step 2: Convert to fraction form
   42,798.18/64,212.45 = 19,103.56/x
3. Step 3: Cross multiply
   42,798.18x = 64,212.45 × 19,103.56
4. Step 4: Simplify right side
   42,798.18x = 1,226,686,391.32
5. Step 5: Solve for x
   x = 1,226,686,391.32/42,798.18
6. Step 6: Final answer
   x = 28,662.12