Finding the Fourth Proportional to 139,643.52, 209,386.88 and 123,041.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,643.52 : 209,386.88 = 123,041.28 : x
2. Step 2: Convert to fraction form
   139,643.52/209,386.88 = 123,041.28/x
3. Step 3: Cross multiply
   139,643.52x = 209,386.88 × 123,041.28
4. Step 4: Simplify right side
   139,643.52x = 25,763,229,730.41
5. Step 5: Solve for x
   x = 25,763,229,730.41/139,643.52
6. Step 6: Final answer
   x = 184,492.84