Finding the Fourth Proportional to 58,267.58, 80,713.80 and 57,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   58,267.58 : 80,713.80 = 57,086.60 : x
2. Step 2: Convert to fraction form
   58,267.58/80,713.80 = 57,086.60/x
3. Step 3: Cross multiply
   58,267.58x = 80,713.80 × 57,086.60
4. Step 4: Simplify right side
   58,267.58x = 4,607,676,616.86
5. Step 5: Solve for x
   x = 4,607,676,616.86/58,267.58
6. Step 6: Final answer
   x = 79,077.88