Finding the Fourth Proportional to 109,471.72, 164,087.10 and 42,899.40

Step by Step Solution

1. Step 1: Write the proportion equation
   109,471.72 : 164,087.10 = 42,899.40 : x
2. Step 2: Convert to fraction form
   109,471.72/164,087.10 = 42,899.40/x
3. Step 3: Cross multiply
   109,471.72x = 164,087.10 × 42,899.40
4. Step 4: Simplify right side
   109,471.72x = 7,039,238,137.74
5. Step 5: Solve for x
   x = 7,039,238,137.74/109,471.72
6. Step 6: Final answer
   x = 64,301.89