Finding the Fourth Proportional to 438,780.42, 658,195.25 and 123,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   438,780.42 : 658,195.25 = 123,212.72 : x
2. Step 2: Convert to fraction form
   438,780.42/658,195.25 = 123,212.72/x
3. Step 3: Cross multiply
   438,780.42x = 658,195.25 × 123,212.72
4. Step 4: Simplify right side
   438,780.42x = 81,098,025,604.77
5. Step 5: Solve for x
   x = 81,098,025,604.77/438,780.42
6. Step 6: Final answer
   x = 184,825.99