Finding the Fourth Proportional to 13,439, 18,546.54 and 7,774.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,439 : 18,546.54 = 7,774.04 : x
2. Step 2: Convert to fraction form
   13,439/18,546.54 = 7,774.04/x
3. Step 3: Cross multiply
   13,439x = 18,546.54 × 7,774.04
4. Step 4: Simplify right side
   13,439x = 144,181,543.82
5. Step 5: Solve for x
   x = 144,181,543.82/13,439
6. Step 6: Final answer
   x = 10,728.59