Finding the Fourth Proportional to 101,185.66, 139,629 and 55,856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   101,185.66 : 139,629 = 55,856.32 : x
2. Step 2: Convert to fraction form
   101,185.66/139,629 = 55,856.32/x
3. Step 3: Cross multiply
   101,185.66x = 139,629 × 55,856.32
4. Step 4: Simplify right side
   101,185.66x = 7,799,162,105.28
5. Step 5: Solve for x
   x = 7,799,162,105.28/101,185.66
6. Step 6: Final answer
   x = 77,077.74