Finding the Fourth Proportional to 92,870.24, 139,328.94 and 42,986.32

Step by Step Solution

1. Step 1: Write the proportion equation
   92,870.24 : 139,328.94 = 42,986.32 : x
2. Step 2: Convert to fraction form
   92,870.24/139,328.94 = 42,986.32/x
3. Step 3: Cross multiply
   92,870.24x = 139,328.94 × 42,986.32
4. Step 4: Simplify right side
   92,870.24x = 5,989,238,400.10
5. Step 5: Solve for x
   x = 5,989,238,400.10/92,870.24
6. Step 6: Final answer
   x = 64,490.39