Finding the Fourth Proportional to 238,222.56, 328,747.36 and 137,620.56

Step by Step Solution

1. Step 1: Write the proportion equation
   238,222.56 : 328,747.36 = 137,620.56 : x
2. Step 2: Convert to fraction form
   238,222.56/328,747.36 = 137,620.56/x
3. Step 3: Cross multiply
   238,222.56x = 328,747.36 × 137,620.56
4. Step 4: Simplify right side
   238,222.56x = 45,242,395,781.72
5. Step 5: Solve for x
   x = 45,242,395,781.72/238,222.56
6. Step 6: Final answer
   x = 189,916.50