Finding the Fourth Proportional to 78,316.49, 108,076.85 and 42,506.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,316.49 : 108,076.85 = 42,506.50 : x
2. Step 2: Convert to fraction form
   78,316.49/108,076.85 = 42,506.50/x
3. Step 3: Cross multiply
   78,316.49x = 108,076.85 × 42,506.50
4. Step 4: Simplify right side
   78,316.49x = 4,593,968,624.53
5. Step 5: Solve for x
   x = 4,593,968,624.53/78,316.49
6. Step 6: Final answer
   x = 58,659.02