Finding the Fourth Proportional to 78,198.19, 107,913.63 and 42,388.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,198.19 : 107,913.63 = 42,388.18 : x
2. Step 2: Convert to fraction form
   78,198.19/107,913.63 = 42,388.18/x
3. Step 3: Cross multiply
   78,198.19x = 107,913.63 × 42,388.18
4. Step 4: Simplify right side
   78,198.19x = 4,574,262,372.89
5. Step 5: Solve for x
   x = 4,574,262,372.89/78,198.19
6. Step 6: Final answer
   x = 58,495.76