Finding the Fourth Proportional to 105,185.83, 145,161.88 and 64,337.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,185.83 : 145,161.88 = 64,337.15 : x
2. Step 2: Convert to fraction form
   105,185.83/145,161.88 = 64,337.15/x
3. Step 3: Cross multiply
   105,185.83x = 145,161.88 × 64,337.15
4. Step 4: Simplify right side
   105,185.83x = 9,339,301,647.84
5. Step 5: Solve for x
   x = 9,339,301,647.84/105,185.83
6. Step 6: Final answer
   x = 88,788.60