Finding the Fourth Proportional to 109,484.40, 164,231.46 and 42,918.60

Step by Step Solution

1. Step 1: Write the proportion equation
   109,484.40 : 164,231.46 = 42,918.60 : x
2. Step 2: Convert to fraction form
   109,484.40/164,231.46 = 42,918.60/x
3. Step 3: Cross multiply
   109,484.40x = 164,231.46 × 42,918.60
4. Step 4: Simplify right side
   109,484.40x = 7,048,584,339.16
5. Step 5: Solve for x
   x = 7,048,584,339.16/109,484.40
6. Step 6: Final answer
   x = 64,379.81