Finding the Fourth Proportional to 139,731.78, 193,025.88 and 124,619.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,731.78 : 193,025.88 = 124,619.58 : x
2. Step 2: Convert to fraction form
   139,731.78/193,025.88 = 124,619.58/x
3. Step 3: Cross multiply
   139,731.78x = 193,025.88 × 124,619.58
4. Step 4: Simplify right side
   139,731.78x = 24,054,804,094.73
5. Step 5: Solve for x
   x = 24,054,804,094.73/139,731.78
6. Step 6: Final answer
   x = 172,149.84