Finding the Fourth Proportional to 92,986.72, 139,476.42 and 39,656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   92,986.72 : 139,476.42 = 39,656.72 : x
2. Step 2: Convert to fraction form
   92,986.72/139,476.42 = 39,656.72/x
3. Step 3: Cross multiply
   92,986.72x = 139,476.42 × 39,656.72
4. Step 4: Simplify right side
   92,986.72x = 5,531,177,334.54
5. Step 5: Solve for x
   x = 5,531,177,334.54/92,986.72
6. Step 6: Final answer
   x = 59,483.52