Finding the Fourth Proportional to 92,838.56, 139,235.42 and 42,870.62

Step by Step Solution

1. Step 1: Write the proportion equation
   92,838.56 : 139,235.42 = 42,870.62 : x
2. Step 2: Convert to fraction form
   92,838.56/139,235.42 = 42,870.62/x
3. Step 3: Cross multiply
   92,838.56x = 139,235.42 × 42,870.62
4. Step 4: Simplify right side
   92,838.56x = 5,969,108,453.43
5. Step 5: Solve for x
   x = 5,969,108,453.43/92,838.56
6. Step 6: Final answer
   x = 64,295.58