Finding the Fourth Proportional to 438,781.42, 658,196.75 and 123,213.72

Step by Step Solution

1. Step 1: Write the proportion equation
   438,781.42 : 658,196.75 = 123,213.72 : x
2. Step 2: Convert to fraction form
   438,781.42/658,196.75 = 123,213.72/x
3. Step 3: Cross multiply
   438,781.42x = 658,196.75 × 123,213.72
4. Step 4: Simplify right side
   438,781.42x = 81,098,870,059.41
5. Step 5: Solve for x
   x = 81,098,870,059.41/438,781.42
6. Step 6: Final answer
   x = 184,827.49