Finding the Fourth Proportional to 109,412.20, 164,003.10 and 42,826.60

Step by Step Solution

1. Step 1: Write the proportion equation
   109,412.20 : 164,003.10 = 42,826.60 : x
2. Step 2: Convert to fraction form
   109,412.20/164,003.10 = 42,826.60/x
3. Step 3: Cross multiply
   109,412.20x = 164,003.10 × 42,826.60
4. Step 4: Simplify right side
   109,412.20x = 7,023,695,162.46
5. Step 5: Solve for x
   x = 7,023,695,162.46/109,412.20
6. Step 6: Final answer
   x = 64,194.81