Finding the Fourth Proportional to 139,036.48, 208,554.56 and 55,911.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,036.48 : 208,554.56 = 55,911.04 : x
2. Step 2: Convert to fraction form
   139,036.48/208,554.56 = 55,911.04/x
3. Step 3: Cross multiply
   139,036.48x = 208,554.56 × 55,911.04
4. Step 4: Simplify right side
   139,036.48x = 11,660,502,346.34
5. Step 5: Solve for x
   x = 11,660,502,346.34/139,036.48
6. Step 6: Final answer
   x = 83,866.50