Finding the Fourth Proportional to 58,289.79, 80,245.35 and 55,611.72

Step by Step Solution

1. Step 1: Write the proportion equation
   58,289.79 : 80,245.35 = 55,611.72 : x
2. Step 2: Convert to fraction form
   58,289.79/80,245.35 = 55,611.72/x
3. Step 3: Cross multiply
   58,289.79x = 80,245.35 × 55,611.72
4. Step 4: Simplify right side
   58,289.79x = 4,462,581,935.50
5. Step 5: Solve for x
   x = 4,462,581,935.50/58,289.79
6. Step 6: Final answer
   x = 76,558.55