Finding the Fourth Proportional to 100,760.34, 139,049.91 and 55,441.20

Step by Step Solution

1. Step 1: Write the proportion equation
   100,760.34 : 139,049.91 = 55,441.20 : x
2. Step 2: Convert to fraction form
   100,760.34/139,049.91 = 55,441.20/x
3. Step 3: Cross multiply
   100,760.34x = 139,049.91 × 55,441.20
4. Step 4: Simplify right side
   100,760.34x = 7,709,093,870.29
5. Step 5: Solve for x
   x = 7,709,093,870.29/100,760.34
6. Step 6: Final answer
   x = 76,509.21