Finding the Fourth Proportional to 39,055.55, 53,896.69 and 21,150.59

Step by Step Solution

1. Step 1: Write the proportion equation
   39,055.55 : 53,896.69 = 21,150.59 : x
2. Step 2: Convert to fraction form
   39,055.55/53,896.69 = 21,150.59/x
3. Step 3: Cross multiply
   39,055.55x = 53,896.69 × 21,150.59
4. Step 4: Simplify right side
   39,055.55x = 1,139,946,549.50
5. Step 5: Solve for x
   x = 1,139,946,549.50/39,055.55
6. Step 6: Final answer
   x = 29,187.82