Finding the Fourth Proportional to 105,972.15, 146,140.90 and 69,609.18

Step by Step Solution

1. Step 1: Write the proportion equation
   105,972.15 : 146,140.90 = 69,609.18 : x
2. Step 2: Convert to fraction form
   105,972.15/146,140.90 = 69,609.18/x
3. Step 3: Cross multiply
   105,972.15x = 146,140.90 × 69,609.18
4. Step 4: Simplify right side
   105,972.15x = 10,172,748,213.46
5. Step 5: Solve for x
   x = 10,172,748,213.46/105,972.15
6. Step 6: Final answer
   x = 95,994.54