Finding the Fourth Proportional to 109,515.90, 164,291.58 and 42,919.92

Step by Step Solution

1. Step 1: Write the proportion equation
   109,515.90 : 164,291.58 = 42,919.92 : x
2. Step 2: Convert to fraction form
   109,515.90/164,291.58 = 42,919.92/x
3. Step 3: Cross multiply
   109,515.90x = 164,291.58 × 42,919.92
4. Step 4: Simplify right side
   109,515.90x = 7,051,381,470.27
5. Step 5: Solve for x
   x = 7,051,381,470.27/109,515.90
6. Step 6: Final answer
   x = 64,386.83