Finding the Fourth Proportional to 105,428.98, 145,552.14 and 69,722.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,428.98 : 145,552.14 = 69,722.56 : x
2. Step 2: Convert to fraction form
   105,428.98/145,552.14 = 69,722.56/x
3. Step 3: Cross multiply
   105,428.98x = 145,552.14 × 69,722.56
4. Step 4: Simplify right side
   105,428.98x = 10,148,267,814.28
5. Step 5: Solve for x
   x = 10,148,267,814.28/105,428.98
6. Step 6: Final answer
   x = 96,256.91