Finding the Fourth Proportional to 78,736.72, 108,657.31 and 42,926.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,736.72 : 108,657.31 = 42,926.99 : x
2. Step 2: Convert to fraction form
   78,736.72/108,657.31 = 42,926.99/x
3. Step 3: Cross multiply
   78,736.72x = 108,657.31 × 42,926.99
4. Step 4: Simplify right side
   78,736.72x = 4,664,330,874.55
5. Step 5: Solve for x
   x = 4,664,330,874.55/78,736.72
6. Step 6: Final answer
   x = 59,239.59