Finding the Fourth Proportional to 39,069.30, 53,915.61 and 21,164.37

Step by Step Solution

1. Step 1: Write the proportion equation
   39,069.30 : 53,915.61 = 21,164.37 : x
2. Step 2: Convert to fraction form
   39,069.30/53,915.61 = 21,164.37/x
3. Step 3: Cross multiply
   39,069.30x = 53,915.61 × 21,164.37
4. Step 4: Simplify right side
   39,069.30x = 1,141,089,918.82
5. Step 5: Solve for x
   x = 1,141,089,918.82/39,069.30
6. Step 6: Final answer
   x = 29,206.82