Finding the Fourth Proportional to 101,200.05, 139,661.51 and 55,877.87

Step by Step Solution

1. Step 1: Write the proportion equation
   101,200.05 : 139,661.51 = 55,877.87 : x
2. Step 2: Convert to fraction form
   101,200.05/139,661.51 = 55,877.87/x
3. Step 3: Cross multiply
   101,200.05x = 139,661.51 × 55,877.87
4. Step 4: Simplify right side
   101,200.05x = 7,803,986,722.09
5. Step 5: Solve for x
   x = 7,803,986,722.09/101,200.05
6. Step 6: Final answer
   x = 77,114.46