Finding the Fourth Proportional to 101,005.72, 139,387.89 and 55,684.48

Step by Step Solution

1. Step 1: Write the proportion equation
   101,005.72 : 139,387.89 = 55,684.48 : x
2. Step 2: Convert to fraction form
   101,005.72/139,387.89 = 55,684.48/x
3. Step 3: Cross multiply
   101,005.72x = 139,387.89 × 55,684.48
4. Step 4: Simplify right side
   101,005.72x = 7,761,742,172.95
5. Step 5: Solve for x
   x = 7,761,742,172.95/101,005.72
6. Step 6: Final answer
   x = 76,844.58