Finding the Fourth Proportional to 139,837.25, 192,961.04 and 78,573.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,837.25 : 192,961.04 = 78,573.71 : x
2. Step 2: Convert to fraction form
   139,837.25/192,961.04 = 78,573.71/x
3. Step 3: Cross multiply
   139,837.25x = 192,961.04 × 78,573.71
4. Step 4: Simplify right side
   139,837.25x = 15,161,664,887.79
5. Step 5: Solve for x
   x = 15,161,664,887.79/139,837.25
6. Step 6: Final answer
   x = 108,423.65