Finding the Fourth Proportional to 101,018.71, 139,399.53 and 55,697.19

Step by Step Solution

1. Step 1: Write the proportion equation
   101,018.71 : 139,399.53 = 55,697.19 : x
2. Step 2: Convert to fraction form
   101,018.71/139,399.53 = 55,697.19/x
3. Step 3: Cross multiply
   101,018.71x = 139,399.53 × 55,697.19
4. Step 4: Simplify right side
   101,018.71x = 7,764,161,690.00
5. Step 5: Solve for x
   x = 7,764,161,690.00/101,018.71
6. Step 6: Final answer
   x = 76,858.65