Finding the Fourth Proportional to 51,438.83, 70,987.61 and 30,217.91

Step by Step Solution

1. Step 1: Write the proportion equation
   51,438.83 : 70,987.61 = 30,217.91 : x
2. Step 2: Convert to fraction form
   51,438.83/70,987.61 = 30,217.91/x
3. Step 3: Cross multiply
   51,438.83x = 70,987.61 × 30,217.91
4. Step 4: Simplify right side
   51,438.83x = 2,145,097,059.01
5. Step 5: Solve for x
   x = 2,145,097,059.01/51,438.83
6. Step 6: Final answer
   x = 41,701.90