Finding the Fourth Proportional to 64,239, 88,704.54 and 40,405.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,239 : 88,704.54 = 40,405.56 : x
2. Step 2: Convert to fraction form
   64,239/88,704.54 = 40,405.56/x
3. Step 3: Cross multiply
   64,239x = 88,704.54 × 40,405.56
4. Step 4: Simplify right side
   64,239x = 3,584,156,613.24
5. Step 5: Solve for x
   x = 3,584,156,613.24/64,239
6. Step 6: Final answer
   x = 55,794.09