Finding the Fourth Proportional to 100,757.99, 139,046.01 and 55,434.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,757.99 : 139,046.01 = 55,434.98 : x
2. Step 2: Convert to fraction form
   100,757.99/139,046.01 = 55,434.98/x
3. Step 3: Cross multiply
   100,757.99x = 139,046.01 × 55,434.98
4. Step 4: Simplify right side
   100,757.99x = 7,708,012,783.43
5. Step 5: Solve for x
   x = 7,708,012,783.43/100,757.99
6. Step 6: Final answer
   x = 76,500.26