Finding the Fourth Proportional to 78,629.67, 108,510.89 and 42,821.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,629.67 : 108,510.89 = 42,821.62 : x
2. Step 2: Convert to fraction form
   78,629.67/108,510.89 = 42,821.62/x
3. Step 3: Cross multiply
   78,629.67x = 108,510.89 × 42,821.62
4. Step 4: Simplify right side
   78,629.67x = 4,646,611,612.06
5. Step 5: Solve for x
   x = 4,646,611,612.06/78,629.67
6. Step 6: Final answer
   x = 59,094.89