Finding the Fourth Proportional to 78,783.67, 108,721.80 and 42,974.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,783.67 : 108,721.80 = 42,974.45 : x
2. Step 2: Convert to fraction form
   78,783.67/108,721.80 = 42,974.45/x
3. Step 3: Cross multiply
   78,783.67x = 108,721.80 × 42,974.45
4. Step 4: Simplify right side
   78,783.67x = 4,672,259,558.01
5. Step 5: Solve for x
   x = 4,672,259,558.01/78,783.67
6. Step 6: Final answer
   x = 59,304.92