Finding the Fourth Proportional to 42,367.48, 63,561.47 and 12,783.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,367.48 : 63,561.47 = 12,783.51 : x
2. Step 2: Convert to fraction form
   42,367.48/63,561.47 = 12,783.51/x
3. Step 3: Cross multiply
   42,367.48x = 63,561.47 × 12,783.51
4. Step 4: Simplify right side
   42,367.48x = 812,538,623.44
5. Step 5: Solve for x
   x = 812,538,623.44/42,367.48
6. Step 6: Final answer
   x = 19,178.36