Finding the Fourth Proportional to 139,078.72, 208,403.52 and 93,923.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,078.72 : 208,403.52 = 93,923.20 : x
2. Step 2: Convert to fraction form
   139,078.72/208,403.52 = 93,923.20/x
3. Step 3: Cross multiply
   139,078.72x = 208,403.52 × 93,923.20
4. Step 4: Simplify right side
   139,078.72x = 19,573,925,489.66
5. Step 5: Solve for x
   x = 19,573,925,489.66/139,078.72
6. Step 6: Final answer
   x = 140,739.90