Finding the Fourth Proportional to 92,976.40, 139,353.90 and 42,986.44

Step by Step Solution

1. Step 1: Write the proportion equation
   92,976.40 : 139,353.90 = 42,986.44 : x
2. Step 2: Convert to fraction form
   92,976.40/139,353.90 = 42,986.44/x
3. Step 3: Cross multiply
   92,976.40x = 139,353.90 × 42,986.44
4. Step 4: Simplify right side
   92,976.40x = 5,990,328,061.12
5. Step 5: Solve for x
   x = 5,990,328,061.12/92,976.40
6. Step 6: Final answer
   x = 64,428.48