Finding the Fourth Proportional to 39,196.07, 54,090.59 and 21,291.02

Step by Step Solution

1. Step 1: Write the proportion equation
   39,196.07 : 54,090.59 = 21,291.02 : x
2. Step 2: Convert to fraction form
   39,196.07/54,090.59 = 21,291.02/x
3. Step 3: Cross multiply
   39,196.07x = 54,090.59 × 21,291.02
4. Step 4: Simplify right side
   39,196.07x = 1,151,643,659.43
5. Step 5: Solve for x
   x = 1,151,643,659.43/39,196.07
6. Step 6: Final answer
   x = 29,381.61