Finding the Fourth Proportional to 139,962.24, 193,146.84 and 76,302.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,962.24 : 193,146.84 = 76,302.72 : x
2. Step 2: Convert to fraction form
   139,962.24/193,146.84 = 76,302.72/x
3. Step 3: Cross multiply
   139,962.24x = 193,146.84 × 76,302.72
4. Step 4: Simplify right side
   139,962.24x = 14,737,629,251.40
5. Step 5: Solve for x
   x = 14,737,629,251.40/139,962.24
6. Step 6: Final answer
   x = 105,297.18