Finding the Fourth Proportional to 142,261.61, 213,321.34 and 47,458.81

Step by Step Solution

1. Step 1: Write the proportion equation
   142,261.61 : 213,321.34 = 47,458.81 : x
2. Step 2: Convert to fraction form
   142,261.61/213,321.34 = 47,458.81/x
3. Step 3: Cross multiply
   142,261.61x = 213,321.34 × 47,458.81
4. Step 4: Simplify right side
   142,261.61x = 10,123,975,640.10
5. Step 5: Solve for x
   x = 10,123,975,640.10/142,261.61
6. Step 6: Final answer
   x = 71,164.50