Finding the Fourth Proportional to 101,231.35, 139,700.31 and 55,910.47

Step by Step Solution

1. Step 1: Write the proportion equation
   101,231.35 : 139,700.31 = 55,910.47 : x
2. Step 2: Convert to fraction form
   101,231.35/139,700.31 = 55,910.47/x
3. Step 3: Cross multiply
   101,231.35x = 139,700.31 × 55,910.47
4. Step 4: Simplify right side
   101,231.35x = 7,810,709,991.25
5. Step 5: Solve for x
   x = 7,810,709,991.25/101,231.35
6. Step 6: Final answer
   x = 77,157.03