Finding the Fourth Proportional to 72,457.86, 99,886.86 and 50,881.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,457.86 : 99,886.86 = 50,881.89 : x
2. Step 2: Convert to fraction form
   72,457.86/99,886.86 = 50,881.89/x
3. Step 3: Cross multiply
   72,457.86x = 99,886.86 × 50,881.89
4. Step 4: Simplify right side
   72,457.86x = 5,082,432,222.97
5. Step 5: Solve for x
   x = 5,082,432,222.97/72,457.86
6. Step 6: Final answer
   x = 70,143.28