Finding the Fourth Proportional to 112,238.39, 154,915.49 and 64,519.43

Step by Step Solution

1. Step 1: Write the proportion equation
   112,238.39 : 154,915.49 = 64,519.43 : x
2. Step 2: Convert to fraction form
   112,238.39/154,915.49 = 64,519.43/x
3. Step 3: Cross multiply
   112,238.39x = 154,915.49 × 64,519.43
4. Step 4: Simplify right side
   112,238.39x = 9,995,058,499.69
5. Step 5: Solve for x
   x = 9,995,058,499.69/112,238.39
6. Step 6: Final answer
   x = 89,052.05