Finding the Fourth Proportional to 107,019.42, 147,687.89 and 64,569.75

Step by Step Solution

1. Step 1: Write the proportion equation
   107,019.42 : 147,687.89 = 64,569.75 : x
2. Step 2: Convert to fraction form
   107,019.42/147,687.89 = 64,569.75/x
3. Step 3: Cross multiply
   107,019.42x = 147,687.89 × 64,569.75
4. Step 4: Simplify right side
   107,019.42x = 9,536,169,812.48
5. Step 5: Solve for x
   x = 9,536,169,812.48/107,019.42
6. Step 6: Final answer
   x = 89,106.91