Finding the Fourth Proportional to 109,515.51, 164,272.79 and 42,908.60

Step by Step Solution

1. Step 1: Write the proportion equation
   109,515.51 : 164,272.79 = 42,908.60 : x
2. Step 2: Convert to fraction form
   109,515.51/164,272.79 = 42,908.60/x
3. Step 3: Cross multiply
   109,515.51x = 164,272.79 × 42,908.60
4. Step 4: Simplify right side
   109,515.51x = 7,048,715,222.45
5. Step 5: Solve for x
   x = 7,048,715,222.45/109,515.51
6. Step 6: Final answer
   x = 64,362.71