Finding the Fourth Proportional to 101,056.72, 139,452.12 and 55,735.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,056.72 : 139,452.12 = 55,735.20 : x
2. Step 2: Convert to fraction form
   101,056.72/139,452.12 = 55,735.20/x
3. Step 3: Cross multiply
   101,056.72x = 139,452.12 × 55,735.20
4. Step 4: Simplify right side
   101,056.72x = 7,772,391,798.62
5. Step 5: Solve for x
   x = 7,772,391,798.62/101,056.72
6. Step 6: Final answer
   x = 76,911.18