Finding the Fourth Proportional to 78,736.52, 108,659.81 and 42,928.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,736.52 : 108,659.81 = 42,928.58 : x
2. Step 2: Convert to fraction form
   78,736.52/108,659.81 = 42,928.58/x
3. Step 3: Cross multiply
   78,736.52x = 108,659.81 × 42,928.58
4. Step 4: Simplify right side
   78,736.52x = 4,664,611,131.73
5. Step 5: Solve for x
   x = 4,664,611,131.73/78,736.52
6. Step 6: Final answer
   x = 59,243.30