Finding the Fourth Proportional to 101,449.61, 139,997.06 and 55,509.05

Step by Step Solution

1. Step 1: Write the proportion equation
   101,449.61 : 139,997.06 = 55,509.05 : x
2. Step 2: Convert to fraction form
   101,449.61/139,997.06 = 55,509.05/x
3. Step 3: Cross multiply
   101,449.61x = 139,997.06 × 55,509.05
4. Step 4: Simplify right side
   101,449.61x = 7,771,103,296.52
5. Step 5: Solve for x
   x = 7,771,103,296.52/101,449.61
6. Step 6: Final answer
   x = 76,600.62