Finding the Fourth Proportional to 39,069.48, 53,915.83 and 21,164.55

Step by Step Solution

1. Step 1: Write the proportion equation
   39,069.48 : 53,915.83 = 21,164.55 : x
2. Step 2: Convert to fraction form
   39,069.48/53,915.83 = 21,164.55/x
3. Step 3: Cross multiply
   39,069.48x = 53,915.83 × 21,164.55
4. Step 4: Simplify right side
   39,069.48x = 1,141,104,279.83
5. Step 5: Solve for x
   x = 1,141,104,279.83/39,069.48
6. Step 6: Final answer
   x = 29,207.05