Finding the Fourth Proportional to 112,464.59, 155,214.77 and 64,716.91

Step by Step Solution

1. Step 1: Write the proportion equation
   112,464.59 : 155,214.77 = 64,716.91 : x
2. Step 2: Convert to fraction form
   112,464.59/155,214.77 = 64,716.91/x
3. Step 3: Cross multiply
   112,464.59x = 155,214.77 × 64,716.91
4. Step 4: Simplify right side
   112,464.59x = 10,045,019,589.14
5. Step 5: Solve for x
   x = 10,045,019,589.14/112,464.59
6. Step 6: Final answer
   x = 89,317.18