Finding the Fourth Proportional to 121,744.72, 182,669.88 and 42,915.28

Step by Step Solution

1. Step 1: Write the proportion equation
   121,744.72 : 182,669.88 = 42,915.28 : x
2. Step 2: Convert to fraction form
   121,744.72/182,669.88 = 42,915.28/x
3. Step 3: Cross multiply
   121,744.72x = 182,669.88 × 42,915.28
4. Step 4: Simplify right side
   121,744.72x = 7,839,329,047.77
5. Step 5: Solve for x
   x = 7,839,329,047.77/121,744.72
6. Step 6: Final answer
   x = 64,391.53