Finding the Fourth Proportional to 78,824.82, 108,896.72 and 51,665.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,824.82 : 108,896.72 = 51,665.34 : x
2. Step 2: Convert to fraction form
   78,824.82/108,896.72 = 51,665.34/x
3. Step 3: Cross multiply
   78,824.82x = 108,896.72 × 51,665.34
4. Step 4: Simplify right side
   78,824.82x = 5,626,186,063.68
5. Step 5: Solve for x
   x = 5,626,186,063.68/78,824.82
6. Step 6: Final answer
   x = 71,375.82