Finding the Fourth Proportional to 109,515.09, 164,290.41 and 42,919.12

Step by Step Solution

1. Step 1: Write the proportion equation
   109,515.09 : 164,290.41 = 42,919.12 : x
2. Step 2: Convert to fraction form
   109,515.09/164,290.41 = 42,919.12/x
3. Step 3: Cross multiply
   109,515.09x = 164,290.41 × 42,919.12
4. Step 4: Simplify right side
   109,515.09x = 7,051,200,027.00
5. Step 5: Solve for x
   x = 7,051,200,027.00/109,515.09
6. Step 6: Final answer
   x = 64,385.65