Finding the Fourth Proportional to 243,071.15, 335,404.59 and 135,620.30

Step by Step Solution

1. Step 1: Write the proportion equation
   243,071.15 : 335,404.59 = 135,620.30 : x
2. Step 2: Convert to fraction form
   243,071.15/335,404.59 = 135,620.30/x
3. Step 3: Cross multiply
   243,071.15x = 335,404.59 × 135,620.30
4. Step 4: Simplify right side
   243,071.15x = 45,487,669,440.15
5. Step 5: Solve for x
   x = 45,487,669,440.15/243,071.15
6. Step 6: Final answer
   x = 187,137.27