Finding the Fourth Proportional to 78,544.74, 108,388.50 and 42,734.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,544.74 : 108,388.50 = 42,734.89 : x
2. Step 2: Convert to fraction form
   78,544.74/108,388.50 = 42,734.89/x
3. Step 3: Cross multiply
   78,544.74x = 108,388.50 × 42,734.89
4. Step 4: Simplify right side
   78,544.74x = 4,631,970,329.02
5. Step 5: Solve for x
   x = 4,631,970,329.02/78,544.74
6. Step 6: Final answer
   x = 58,972.38