Finding the Fourth Proportional to 39,069.39, 53,915.58 and 21,164.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,069.39 : 53,915.58 = 21,164.34 : x
2. Step 2: Convert to fraction form
   39,069.39/53,915.58 = 21,164.34/x
3. Step 3: Cross multiply
   39,069.39x = 53,915.58 × 21,164.34
4. Step 4: Simplify right side
   39,069.39x = 1,141,087,666.42
5. Step 5: Solve for x
   x = 1,141,087,666.42/39,069.39
6. Step 6: Final answer
   x = 29,206.69