Finding the Fourth Proportional to 87,574.50, 120,855.69 and 47,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,574.50 : 120,855.69 = 47,830.50 : x
2. Step 2: Convert to fraction form
   87,574.50/120,855.69 = 47,830.50/x
3. Step 3: Cross multiply
   87,574.50x = 120,855.69 × 47,830.50
4. Step 4: Simplify right side
   87,574.50x = 5,780,588,080.55
5. Step 5: Solve for x
   x = 5,780,588,080.55/87,574.50
6. Step 6: Final answer
   x = 66,007.66