Finding the Fourth Proportional to 219,348.50, 329,044.41 and 91,238.49

Step by Step Solution

1. Step 1: Write the proportion equation
   219,348.50 : 329,044.41 = 91,238.49 : x
2. Step 2: Convert to fraction form
   219,348.50/329,044.41 = 91,238.49/x
3. Step 3: Cross multiply
   219,348.50x = 329,044.41 × 91,238.49
4. Step 4: Simplify right side
   219,348.50x = 30,021,515,111.34
5. Step 5: Solve for x
   x = 30,021,515,111.34/219,348.50
6. Step 6: Final answer
   x = 136,866.75