Finding the Fourth Proportional to 110,377.40, 152,352.78 and 72,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   110,377.40 : 152,352.78 = 72,142.72 : x
2. Step 2: Convert to fraction form
   110,377.40/152,352.78 = 72,142.72/x
3. Step 3: Cross multiply
   110,377.40x = 152,352.78 × 72,142.72
4. Step 4: Simplify right side
   110,377.40x = 10,991,143,948.76
5. Step 5: Solve for x
   x = 10,991,143,948.76/110,377.40
6. Step 6: Final answer
   x = 99,577.85