Finding the Fourth Proportional to 58,432.76, 80,647.34 and 56,488.76

Step by Step Solution

1. Step 1: Write the proportion equation
   58,432.76 : 80,647.34 = 56,488.76 : x
2. Step 2: Convert to fraction form
   58,432.76/80,647.34 = 56,488.76/x
3. Step 3: Cross multiply
   58,432.76x = 80,647.34 × 56,488.76
4. Step 4: Simplify right side
   58,432.76x = 4,555,668,233.90
5. Step 5: Solve for x
   x = 4,555,668,233.90/58,432.76
6. Step 6: Final answer
   x = 77,964.28