Finding the Fourth Proportional to 142,597.70, 213,890.06 and 47,820.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,597.70 : 213,890.06 = 47,820.59 : x
2. Step 2: Convert to fraction form
   142,597.70/213,890.06 = 47,820.59/x
3. Step 3: Cross multiply
   142,597.70x = 213,890.06 × 47,820.59
4. Step 4: Simplify right side
   142,597.70x = 10,228,347,555.78
5. Step 5: Solve for x
   x = 10,228,347,555.78/142,597.70
6. Step 6: Final answer
   x = 71,728.70