Finding the Fourth Proportional to 76,320.55, 105,328.83 and 42,339.99

Step by Step Solution

1. Step 1: Write the proportion equation
   76,320.55 : 105,328.83 = 42,339.99 : x
2. Step 2: Convert to fraction form
   76,320.55/105,328.83 = 42,339.99/x
3. Step 3: Cross multiply
   76,320.55x = 105,328.83 × 42,339.99
4. Step 4: Simplify right side
   76,320.55x = 4,459,621,608.91
5. Step 5: Solve for x
   x = 4,459,621,608.91/76,320.55
6. Step 6: Final answer
   x = 58,432.78