Finding the Fourth Proportional to 179,978.72, 248,372.50 and 99,408.28

Step by Step Solution

1. Step 1: Write the proportion equation
   179,978.72 : 248,372.50 = 99,408.28 : x
2. Step 2: Convert to fraction form
   179,978.72/248,372.50 = 99,408.28/x
3. Step 3: Cross multiply
   179,978.72x = 248,372.50 × 99,408.28
4. Step 4: Simplify right side
   179,978.72x = 24,690,283,024.30
5. Step 5: Solve for x
   x = 24,690,283,024.30/179,978.72
6. Step 6: Final answer
   x = 137,184.46