Finding the Fourth Proportional to 72,154.98, 99,573.57 and 40,323.87

Step by Step Solution

1. Step 1: Write the proportion equation
   72,154.98 : 99,573.57 = 40,323.87 : x
2. Step 2: Convert to fraction form
   72,154.98/99,573.57 = 40,323.87/x
3. Step 3: Cross multiply
   72,154.98x = 99,573.57 × 40,323.87
4. Step 4: Simplify right side
   72,154.98x = 4,015,191,692.12
5. Step 5: Solve for x
   x = 4,015,191,692.12/72,154.98
6. Step 6: Final answer
   x = 55,646.77