Finding the Fourth Proportional to 139,931.52, 193,108.56 and 76,272.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,931.52 : 193,108.56 = 76,272.48 : x
2. Step 2: Convert to fraction form
   139,931.52/193,108.56 = 76,272.48/x
3. Step 3: Cross multiply
   139,931.52x = 193,108.56 × 76,272.48
4. Step 4: Simplify right side
   139,931.52x = 14,728,868,780.43
5. Step 5: Solve for x
   x = 14,728,868,780.43/139,931.52
6. Step 6: Final answer
   x = 105,257.69