Finding the Fourth Proportional to 78,782.76, 108,721.67 and 42,974.06

Step by Step Solution

1. Step 1: Write the proportion equation
   78,782.76 : 108,721.67 = 42,974.06 : x
2. Step 2: Convert to fraction form
   78,782.76/108,721.67 = 42,974.06/x
3. Step 3: Cross multiply
   78,782.76x = 108,721.67 × 42,974.06
4. Step 4: Simplify right side
   78,782.76x = 4,672,210,811.40
5. Step 5: Solve for x
   x = 4,672,210,811.40/78,782.76
6. Step 6: Final answer
   x = 59,304.99