Finding the Fourth Proportional to 72,410.68, 99,921.28 and 40,573.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,410.68 : 99,921.28 = 40,573.42 : x
2. Step 2: Convert to fraction form
   72,410.68/99,921.28 = 40,573.42/x
3. Step 3: Cross multiply
   72,410.68x = 99,921.28 × 40,573.42
4. Step 4: Simplify right side
   72,410.68x = 4,054,148,060.38
5. Step 5: Solve for x
   x = 4,054,148,060.38/72,410.68
6. Step 6: Final answer
   x = 55,988.26