Finding the Fourth Proportional to 243,354.78, 335,826.61 and 135,929.34

Step by Step Solution

1. Step 1: Write the proportion equation
   243,354.78 : 335,826.61 = 135,929.34 : x
2. Step 2: Convert to fraction form
   243,354.78/335,826.61 = 135,929.34/x
3. Step 3: Cross multiply
   243,354.78x = 335,826.61 × 135,929.34
4. Step 4: Simplify right side
   243,354.78x = 45,648,689,111.91
5. Step 5: Solve for x
   x = 45,648,689,111.91/243,354.78
6. Step 6: Final answer
   x = 187,580.82