Finding the Fourth Proportional to 101,099.54, 139,516.41 and 55,777.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101,099.54 : 139,516.41 = 55,777.89 : x
2. Step 2: Convert to fraction form
   101,099.54/139,516.41 = 55,777.89/x
3. Step 3: Cross multiply
   101,099.54x = 139,516.41 × 55,777.89
4. Step 4: Simplify right side
   101,099.54x = 7,781,930,970.17
5. Step 5: Solve for x
   x = 7,781,930,970.17/101,099.54
6. Step 6: Final answer
   x = 76,972.96