Finding the Fourth Proportional to 342,399.32, 513,320.60 and 142,868.34

Step by Step Solution

1. Step 1: Write the proportion equation
   342,399.32 : 513,320.60 = 142,868.34 : x
2. Step 2: Convert to fraction form
   342,399.32/513,320.60 = 142,868.34/x
3. Step 3: Cross multiply
   342,399.32x = 513,320.60 × 142,868.34
4. Step 4: Simplify right side
   342,399.32x = 73,337,262,009.80
5. Step 5: Solve for x
   x = 73,337,262,009.80/342,399.32
6. Step 6: Final answer
   x = 214,186.35