Finding the Fourth Proportional to 139,885.98, 193,042.60 and 76,223.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,885.98 : 193,042.60 = 76,223.72 : x
2. Step 2: Convert to fraction form
   139,885.98/193,042.60 = 76,223.72/x
3. Step 3: Cross multiply
   139,885.98x = 193,042.60 × 76,223.72
4. Step 4: Simplify right side
   139,885.98x = 14,714,425,090.47
5. Step 5: Solve for x
   x = 14,714,425,090.47/139,885.98
6. Step 6: Final answer
   x = 105,188.71