Finding the Fourth Proportional to 238,141.69, 328,639.77 and 130,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   238,141.69 : 328,639.77 = 130,721.72 : x
2. Step 2: Convert to fraction form
   238,141.69/328,639.77 = 130,721.72/x
3. Step 3: Cross multiply
   238,141.69x = 328,639.77 × 130,721.72
4. Step 4: Simplify right side
   238,141.69x = 42,960,354,351.61
5. Step 5: Solve for x
   x = 42,960,354,351.61/238,141.69
6. Step 6: Final answer
   x = 180,398.29