Finding the Fourth Proportional to 109,515.09, 164,273.94 and 42,986.55

Step by Step Solution

1. Step 1: Write the proportion equation
   109,515.09 : 164,273.94 = 42,986.55 : x
2. Step 2: Convert to fraction form
   109,515.09/164,273.94 = 42,986.55/x
3. Step 3: Cross multiply
   109,515.09x = 164,273.94 × 42,986.55
4. Step 4: Simplify right side
   109,515.09x = 7,061,569,935.51
5. Step 5: Solve for x
   x = 7,061,569,935.51/109,515.09
6. Step 6: Final answer
   x = 64,480.34