Finding the Fourth Proportional to 78,749.98, 108,672.59 and 42,940.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,749.98 : 108,672.59 = 42,940.69 : x
2. Step 2: Convert to fraction form
   78,749.98/108,672.59 = 42,940.69/x
3. Step 3: Cross multiply
   78,749.98x = 108,672.59 × 42,940.69
4. Step 4: Simplify right side
   78,749.98x = 4,666,475,834.36
5. Step 5: Solve for x
   x = 4,666,475,834.36/78,749.98
6. Step 6: Final answer
   x = 59,256.85