Finding the Fourth Proportional to 101,222.67, 139,689.50 and 55,900.56

Step by Step Solution

1. Step 1: Write the proportion equation
   101,222.67 : 139,689.50 = 55,900.56 : x
2. Step 2: Convert to fraction form
   101,222.67/139,689.50 = 55,900.56/x
3. Step 3: Cross multiply
   101,222.67x = 139,689.50 × 55,900.56
4. Step 4: Simplify right side
   101,222.67x = 7,808,720,996.62
5. Step 5: Solve for x
   x = 7,808,720,996.62/101,222.67
6. Step 6: Final answer
   x = 77,143.99