Finding the Fourth Proportional to 172,554.78, 238,123.33 and 99,967.57

Step by Step Solution

1. Step 1: Write the proportion equation
   172,554.78 : 238,123.33 = 99,967.57 : x
2. Step 2: Convert to fraction form
   172,554.78/238,123.33 = 99,967.57/x
3. Step 3: Cross multiply
   172,554.78x = 238,123.33 × 99,967.57
4. Step 4: Simplify right side
   172,554.78x = 23,804,610,660.41
5. Step 5: Solve for x
   x = 23,804,610,660.41/172,554.78
6. Step 6: Final answer
   x = 137,953.93