Finding the Fourth Proportional to 72,731, 100,368.12 and 40,900.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,731 : 100,368.12 = 40,900.13 : x
2. Step 2: Convert to fraction form
   72,731/100,368.12 = 40,900.13/x
3. Step 3: Cross multiply
   72,731x = 100,368.12 × 40,900.13
4. Step 4: Simplify right side
   72,731x = 4,105,069,155.86
5. Step 5: Solve for x
   x = 4,105,069,155.86/72,731
6. Step 6: Final answer
   x = 56,441.81