Finding the Fourth Proportional to 105,670, 145,839.52 and 65,396.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,670 : 145,839.52 = 65,396.74 : x
2. Step 2: Convert to fraction form
   105,670/145,839.52 = 65,396.74/x
3. Step 3: Cross multiply
   105,670x = 145,839.52 × 65,396.74
4. Step 4: Simplify right side
   105,670x = 9,537,429,171.16
5. Step 5: Solve for x
   x = 9,537,429,171.16/105,670
6. Step 6: Final answer
   x = 90,256.73