Finding the Fourth Proportional to 101,173.50, 139,621.67 and 55,851.38

Step by Step Solution

1. Step 1: Write the proportion equation
   101,173.50 : 139,621.67 = 55,851.38 : x
2. Step 2: Convert to fraction form
   101,173.50/139,621.67 = 55,851.38/x
3. Step 3: Cross multiply
   101,173.50x = 139,621.67 × 55,851.38
4. Step 4: Simplify right side
   101,173.50x = 7,798,061,970.04
5. Step 5: Solve for x
   x = 7,798,061,970.04/101,173.50
6. Step 6: Final answer
   x = 77,076.13