Finding the Fourth Proportional to 78,783.40, 108,723.12 and 42,974

Step by Step Solution

1. Step 1: Write the proportion equation
   78,783.40 : 108,723.12 = 42,974 : x
2. Step 2: Convert to fraction form
   78,783.40/108,723.12 = 42,974/x
3. Step 3: Cross multiply
   78,783.40x = 108,723.12 × 42,974
4. Step 4: Simplify right side
   78,783.40x = 4,672,267,358.88
5. Step 5: Solve for x
   x = 4,672,267,358.88/78,783.40
6. Step 6: Final answer
   x = 59,305.23