Finding the Fourth Proportional to 105,510.10, 145,564.18 and 69,231.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,510.10 : 145,564.18 = 69,231.56 : x
2. Step 2: Convert to fraction form
   105,510.10/145,564.18 = 69,231.56/x
3. Step 3: Cross multiply
   105,510.10x = 145,564.18 × 69,231.56
4. Step 4: Simplify right side
   105,510.10x = 10,077,635,261.52
5. Step 5: Solve for x
   x = 10,077,635,261.52/105,510.10
6. Step 6: Final answer
   x = 95,513.47