Finding the Fourth Proportional to 92,743.94, 139,099.76 and 42,819.78

Step by Step Solution

1. Step 1: Write the proportion equation
   92,743.94 : 139,099.76 = 42,819.78 : x
2. Step 2: Convert to fraction form
   92,743.94/139,099.76 = 42,819.78/x
3. Step 3: Cross multiply
   92,743.94x = 139,099.76 × 42,819.78
4. Step 4: Simplify right side
   92,743.94x = 5,956,221,121.25
5. Step 5: Solve for x
   x = 5,956,221,121.25/92,743.94
6. Step 6: Final answer
   x = 64,222.21