Finding the Fourth Proportional to 238,141.31, 328,639.25 and 130,721.34

Step by Step Solution

1. Step 1: Write the proportion equation
   238,141.31 : 328,639.25 = 130,721.34 : x
2. Step 2: Convert to fraction form
   238,141.31/328,639.25 = 130,721.34/x
3. Step 3: Cross multiply
   238,141.31x = 328,639.25 × 130,721.34
4. Step 4: Simplify right side
   238,141.31x = 42,960,163,463.40
5. Step 5: Solve for x
   x = 42,960,163,463.40/238,141.31
6. Step 6: Final answer
   x = 180,397.78