Finding the Fourth Proportional to 78,222.14, 107,946.82 and 42,412.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,222.14 : 107,946.82 = 42,412.20 : x
2. Step 2: Convert to fraction form
   78,222.14/107,946.82 = 42,412.20/x
3. Step 3: Cross multiply
   78,222.14x = 107,946.82 × 42,412.20
4. Step 4: Simplify right side
   78,222.14x = 4,578,262,119.20
5. Step 5: Solve for x
   x = 4,578,262,119.20/78,222.14
6. Step 6: Final answer
   x = 58,528.98