Finding the Fourth Proportional to 72,037.16, 99,410.34 and 40,213.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,037.16 : 99,410.34 = 40,213.88 : x
2. Step 2: Convert to fraction form
   72,037.16/99,410.34 = 40,213.88/x
3. Step 3: Cross multiply
   72,037.16x = 99,410.34 × 40,213.88
4. Step 4: Simplify right side
   72,037.16x = 3,997,675,483.52
5. Step 5: Solve for x
   x = 3,997,675,483.52/72,037.16
6. Step 6: Final answer
   x = 55,494.63