Finding the Fourth Proportional to 101,328.77, 139,834.15 and 55,389.35

Step by Step Solution

1. Step 1: Write the proportion equation
   101,328.77 : 139,834.15 = 55,389.35 : x
2. Step 2: Convert to fraction form
   101,328.77/139,834.15 = 55,389.35/x
3. Step 3: Cross multiply
   101,328.77x = 139,834.15 × 55,389.35
4. Step 4: Simplify right side
   101,328.77x = 7,745,322,887.41
5. Step 5: Solve for x
   x = 7,745,322,887.41/101,328.77
6. Step 6: Final answer
   x = 76,437.55