Finding the Fourth Proportional to 101,047.50, 139,443.68 and 55,729.69

Step by Step Solution

1. Step 1: Write the proportion equation
   101,047.50 : 139,443.68 = 55,729.69 : x
2. Step 2: Convert to fraction form
   101,047.50/139,443.68 = 55,729.69/x
3. Step 3: Cross multiply
   101,047.50x = 139,443.68 × 55,729.69
4. Step 4: Simplify right side
   101,047.50x = 7,771,152,849.57
5. Step 5: Solve for x
   x = 7,771,152,849.57/101,047.50
6. Step 6: Final answer
   x = 76,905.94