Finding the Fourth Proportional to 58,405.56, 80,518.22 and 40,469.72

Step by Step Solution

1. Step 1: Write the proportion equation
   58,405.56 : 80,518.22 = 40,469.72 : x
2. Step 2: Convert to fraction form
   58,405.56/80,518.22 = 40,469.72/x
3. Step 3: Cross multiply
   58,405.56x = 80,518.22 × 40,469.72
4. Step 4: Simplify right side
   58,405.56x = 3,258,549,818.30
5. Step 5: Solve for x
   x = 3,258,549,818.30/58,405.56
6. Step 6: Final answer
   x = 55,791.77