Finding the Fourth Proportional to 109,519.59, 164,280.69 and 42,991.05

Step by Step Solution

1. Step 1: Write the proportion equation
   109,519.59 : 164,280.69 = 42,991.05 : x
2. Step 2: Convert to fraction form
   109,519.59/164,280.69 = 42,991.05/x
3. Step 3: Cross multiply
   109,519.59x = 164,280.69 × 42,991.05
4. Step 4: Simplify right side
   109,519.59x = 7,062,599,357.82
5. Step 5: Solve for x
   x = 7,062,599,357.82/109,519.59
6. Step 6: Final answer
   x = 64,487.09