Finding the Fourth Proportional to 139,963.10, 193,145.22 and 76,300.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,963.10 : 193,145.22 = 76,300.88 : x
2. Step 2: Convert to fraction form
   139,963.10/193,145.22 = 76,300.88/x
3. Step 3: Cross multiply
   139,963.10x = 193,145.22 × 76,300.88
4. Step 4: Simplify right side
   139,963.10x = 14,737,149,288.07
5. Step 5: Solve for x
   x = 14,737,149,288.07/139,963.10
6. Step 6: Final answer
   x = 105,293.11