Finding the Fourth Proportional to 101,131.42, 139,561.21 and 55,809.41

Step by Step Solution

1. Step 1: Write the proportion equation
   101,131.42 : 139,561.21 = 55,809.41 : x
2. Step 2: Convert to fraction form
   101,131.42/139,561.21 = 55,809.41/x
3. Step 3: Cross multiply
   101,131.42x = 139,561.21 × 55,809.41
4. Step 4: Simplify right side
   101,131.42x = 7,788,828,160.94
5. Step 5: Solve for x
   x = 7,788,828,160.94/101,131.42
6. Step 6: Final answer
   x = 77,016.90