Finding the Fourth Proportional to 342,238.45, 513,392.89 and 129,185.82

Step by Step Solution

1. Step 1: Write the proportion equation
   342,238.45 : 513,392.89 = 129,185.82 : x
2. Step 2: Convert to fraction form
   342,238.45/513,392.89 = 129,185.82/x
3. Step 3: Cross multiply
   342,238.45x = 513,392.89 × 129,185.82
4. Step 4: Simplify right side
   342,238.45x = 66,323,081,476.82
5. Step 5: Solve for x
   x = 66,323,081,476.82/342,238.45
6. Step 6: Final answer
   x = 193,792.02