Finding the Fourth Proportional to 139,829.88, 209,628.72 and 55,538.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,829.88 : 209,628.72 = 55,538.04 : x
2. Step 2: Convert to fraction form
   139,829.88/209,628.72 = 55,538.04/x
3. Step 3: Cross multiply
   139,829.88x = 209,628.72 × 55,538.04
4. Step 4: Simplify right side
   139,829.88x = 11,642,368,236.51
5. Step 5: Solve for x
   x = 11,642,368,236.51/139,829.88
6. Step 6: Final answer
   x = 83,260.95