Finding the Fourth Proportional to 109,517.90, 164,294.58 and 42,921.92

Step by Step Solution

1. Step 1: Write the proportion equation
   109,517.90 : 164,294.58 = 42,921.92 : x
2. Step 2: Convert to fraction form
   109,517.90/164,294.58 = 42,921.92/x
3. Step 3: Cross multiply
   109,517.90x = 164,294.58 × 42,921.92
4. Step 4: Simplify right side
   109,517.90x = 7,051,838,819.19
5. Step 5: Solve for x
   x = 7,051,838,819.19/109,517.90
6. Step 6: Final answer
   x = 64,389.83