Finding the Fourth Proportional to 139,773.78, 192,880.98 and 76,109.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,773.78 : 192,880.98 = 76,109.40 : x
2. Step 2: Convert to fraction form
   139,773.78/192,880.98 = 76,109.40/x
3. Step 3: Cross multiply
   139,773.78x = 192,880.98 × 76,109.40
4. Step 4: Simplify right side
   139,773.78x = 14,680,055,659.21
5. Step 5: Solve for x
   x = 14,680,055,659.21/139,773.78
6. Step 6: Final answer
   x = 105,027.25