Finding the Fourth Proportional to 92,919.98, 139,297.35 and 40,300.76

Step by Step Solution

1. Step 1: Write the proportion equation
   92,919.98 : 139,297.35 = 40,300.76 : x
2. Step 2: Convert to fraction form
   92,919.98/139,297.35 = 40,300.76/x
3. Step 3: Cross multiply
   92,919.98x = 139,297.35 × 40,300.76
4. Step 4: Simplify right side
   92,919.98x = 5,613,789,570.36
5. Step 5: Solve for x
   x = 5,613,789,570.36/92,919.98
6. Step 6: Final answer
   x = 60,415.31