Finding the Fourth Proportional to 78,072.12, 107,739.72 and 42,262.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,072.12 : 107,739.72 = 42,262.56 : x
2. Step 2: Convert to fraction form
   78,072.12/107,739.72 = 42,262.56/x
3. Step 3: Cross multiply
   78,072.12x = 107,739.72 × 42,262.56
4. Step 4: Simplify right side
   78,072.12x = 4,553,356,380.88
5. Step 5: Solve for x
   x = 4,553,356,380.88/78,072.12
6. Step 6: Final answer
   x = 58,322.44