Finding the Fourth Proportional to 92,680.81, 139,062.66 and 42,734.13

Step by Step Solution

1. Step 1: Write the proportion equation
   92,680.81 : 139,062.66 = 42,734.13 : x
2. Step 2: Convert to fraction form
   92,680.81/139,062.66 = 42,734.13/x
3. Step 3: Cross multiply
   92,680.81x = 139,062.66 × 42,734.13
4. Step 4: Simplify right side
   92,680.81x = 5,942,721,790.59
5. Step 5: Solve for x
   x = 5,942,721,790.59/92,680.81
6. Step 6: Final answer
   x = 64,120.30