Finding the Fourth Proportional to 142,621.86, 213,965.59 and 47,864.61

Step by Step Solution

1. Step 1: Write the proportion equation
   142,621.86 : 213,965.59 = 47,864.61 : x
2. Step 2: Convert to fraction form
   142,621.86/213,965.59 = 47,864.61/x
3. Step 3: Cross multiply
   142,621.86x = 213,965.59 × 47,864.61
4. Step 4: Simplify right side
   142,621.86x = 10,241,380,225.25
5. Step 5: Solve for x
   x = 10,241,380,225.25/142,621.86
6. Step 6: Final answer
   x = 71,807.93