Finding the Fourth Proportional to 101,185.51, 139,638.05 and 55,863.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,185.51 : 139,638.05 = 55,863.31 : x
2. Step 2: Convert to fraction form
   101,185.51/139,638.05 = 55,863.31/x
3. Step 3: Cross multiply
   101,185.51x = 139,638.05 × 55,863.31
4. Step 4: Simplify right side
   101,185.51x = 7,800,643,674.95
5. Step 5: Solve for x
   x = 7,800,643,674.95/101,185.51
6. Step 6: Final answer
   x = 77,092.50