Finding the Fourth Proportional to 105,507.12, 145,609.72 and 63,064.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,507.12 : 145,609.72 = 63,064.74 : x
2. Step 2: Convert to fraction form
   105,507.12/145,609.72 = 63,064.74/x
3. Step 3: Cross multiply
   105,507.12x = 145,609.72 × 63,064.74
4. Step 4: Simplify right side
   105,507.12x = 9,182,839,133.27
5. Step 5: Solve for x
   x = 9,182,839,133.27/105,507.12
6. Step 6: Final answer
   x = 87,035.26