Finding the Fourth Proportional to 354,905.69, 489,768.53 and 193,758.89

Step by Step Solution

1. Step 1: Write the proportion equation
   354,905.69 : 489,768.53 = 193,758.89 : x
2. Step 2: Convert to fraction form
   354,905.69/489,768.53 = 193,758.89/x
3. Step 3: Cross multiply
   354,905.69x = 489,768.53 × 193,758.89
4. Step 4: Simplify right side
   354,905.69x = 94,897,003,312.09
5. Step 5: Solve for x
   x = 94,897,003,312.09/354,905.69
6. Step 6: Final answer
   x = 267,386.54