Finding the Fourth Proportional to 243,540.56, 365,340.36 and 85,736.72

Step by Step Solution

1. Step 1: Write the proportion equation
   243,540.56 : 365,340.36 = 85,736.72 : x
2. Step 2: Convert to fraction form
   243,540.56/365,340.36 = 85,736.72/x
3. Step 3: Cross multiply
   243,540.56x = 365,340.36 × 85,736.72
4. Step 4: Simplify right side
   243,540.56x = 31,323,084,150.02
5. Step 5: Solve for x
   x = 31,323,084,150.02/243,540.56
6. Step 6: Final answer
   x = 128,615.47