Finding the Fourth Proportional to 78,538.82, 108,384.89 and 42,729.39

Step by Step Solution

1. Step 1: Write the proportion equation
   78,538.82 : 108,384.89 = 42,729.39 : x
2. Step 2: Convert to fraction form
   78,538.82/108,384.89 = 42,729.39/x
3. Step 3: Cross multiply
   78,538.82x = 108,384.89 × 42,729.39
4. Step 4: Simplify right side
   78,538.82x = 4,631,220,021.27
5. Step 5: Solve for x
   x = 4,631,220,021.27/78,538.82
6. Step 6: Final answer
   x = 58,967.28