Finding the Fourth Proportional to 172,076, 258,123.72 and 61,268

Step by Step Solution

1. Step 1: Write the proportion equation
   172,076 : 258,123.72 = 61,268 : x
2. Step 2: Convert to fraction form
   172,076/258,123.72 = 61,268/x
3. Step 3: Cross multiply
   172,076x = 258,123.72 × 61,268
4. Step 4: Simplify right side
   172,076x = 15,814,724,076.96
5. Step 5: Solve for x
   x = 15,814,724,076.96/172,076
6. Step 6: Final answer
   x = 91,905.46