Finding the Fourth Proportional to 101,185.34, 139,637.70 and 55,863.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,185.34 : 139,637.70 = 55,863.20 : x
2. Step 2: Convert to fraction form
   101,185.34/139,637.70 = 55,863.20/x
3. Step 3: Cross multiply
   101,185.34x = 139,637.70 × 55,863.20
4. Step 4: Simplify right side
   101,185.34x = 7,800,608,064.45
5. Step 5: Solve for x
   x = 7,800,608,064.45/101,185.34
6. Step 6: Final answer
   x = 77,092.28