Finding the Fourth Proportional to 100,853.46, 139,175.91 and 55,530.45

Step by Step Solution

1. Step 1: Write the proportion equation
   100,853.46 : 139,175.91 = 55,530.45 : x
2. Step 2: Convert to fraction form
   100,853.46/139,175.91 = 55,530.45/x
3. Step 3: Cross multiply
   100,853.46x = 139,175.91 × 55,530.45
4. Step 4: Simplify right side
   100,853.46x = 7,728,500,911.46
5. Step 5: Solve for x
   x = 7,728,500,911.46/100,853.46
6. Step 6: Final answer
   x = 76,630.99