Finding the Fourth Proportional to 55,393.49, 76,416.89 and 40,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,393.49 : 76,416.89 = 40,279.50 : x
2. Step 2: Convert to fraction form
   55,393.49/76,416.89 = 40,279.50/x
3. Step 3: Cross multiply
   55,393.49x = 76,416.89 × 40,279.50
4. Step 4: Simplify right side
   55,393.49x = 3,078,033,919.36
5. Step 5: Solve for x
   x = 3,078,033,919.36/55,393.49
6. Step 6: Final answer
   x = 55,566.71