Finding the Fourth Proportional to 105,251.59, 145,199.91 and 64,967.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,251.59 : 145,199.91 = 64,967.05 : x
2. Step 2: Convert to fraction form
   105,251.59/145,199.91 = 64,967.05/x
3. Step 3: Cross multiply
   105,251.59x = 145,199.91 × 64,967.05
4. Step 4: Simplify right side
   105,251.59x = 9,433,209,812.97
5. Step 5: Solve for x
   x = 9,433,209,812.97/105,251.59
6. Step 6: Final answer
   x = 89,625.34