Finding the Fourth Proportional to 101,244.72, 139,717.98 and 55,921.80

Step by Step Solution

1. Step 1: Write the proportion equation
   101,244.72 : 139,717.98 = 55,921.80 : x
2. Step 2: Convert to fraction form
   101,244.72/139,717.98 = 55,921.80/x
3. Step 3: Cross multiply
   101,244.72x = 139,717.98 × 55,921.80
4. Step 4: Simplify right side
   101,244.72x = 7,813,280,933.96
5. Step 5: Solve for x
   x = 7,813,280,933.96/101,244.72
6. Step 6: Final answer
   x = 77,172.23