Finding the Fourth Proportional to 101,191.24, 139,644.10 and 55,869.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,191.24 : 139,644.10 = 55,869.31 : x
2. Step 2: Convert to fraction form
   101,191.24/139,644.10 = 55,869.31/x
3. Step 3: Cross multiply
   101,191.24x = 139,644.10 × 55,869.31
4. Step 4: Simplify right side
   101,191.24x = 7,801,819,372.90
5. Step 5: Solve for x
   x = 7,801,819,372.90/101,191.24
6. Step 6: Final answer
   x = 77,099.75