Finding the Fourth Proportional to 93,186.72, 139,806 and 51,662.88

Step by Step Solution

1. Step 1: Write the proportion equation
   93,186.72 : 139,806 = 51,662.88 : x
2. Step 2: Convert to fraction form
   93,186.72/139,806 = 51,662.88/x
3. Step 3: Cross multiply
   93,186.72x = 139,806 × 51,662.88
4. Step 4: Simplify right side
   93,186.72x = 7,222,780,601.28
5. Step 5: Solve for x
   x = 7,222,780,601.28/93,186.72
6. Step 6: Final answer
   x = 77,508.69