Finding the Fourth Proportional to 230,086.72, 345,215.40 and 103,688.56

Step by Step Solution

1. Step 1: Write the proportion equation
   230,086.72 : 345,215.40 = 103,688.56 : x
2. Step 2: Convert to fraction form
   230,086.72/345,215.40 = 103,688.56/x
3. Step 3: Cross multiply
   230,086.72x = 345,215.40 × 103,688.56
4. Step 4: Simplify right side
   230,086.72x = 35,794,887,715.82
5. Step 5: Solve for x
   x = 35,794,887,715.82/230,086.72
6. Step 6: Final answer
   x = 155,571.29