Finding the Fourth Proportional to 78,857.36, 108,941.86 and 51,697.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,857.36 : 108,941.86 = 51,697.98 : x
2. Step 2: Convert to fraction form
   78,857.36/108,941.86 = 51,697.98/x
3. Step 3: Cross multiply
   78,857.36x = 108,941.86 × 51,697.98
4. Step 4: Simplify right side
   78,857.36x = 5,632,074,099.44
5. Step 5: Solve for x
   x = 5,632,074,099.44/78,857.36
6. Step 6: Final answer
   x = 71,421.03