Finding the Fourth Proportional to 39,063.76, 53,907.89 and 21,158.81

Step by Step Solution

1. Step 1: Write the proportion equation
   39,063.76 : 53,907.89 = 21,158.81 : x
2. Step 2: Convert to fraction form
   39,063.76/53,907.89 = 21,158.81/x
3. Step 3: Cross multiply
   39,063.76x = 53,907.89 × 21,158.81
4. Step 4: Simplify right side
   39,063.76x = 1,140,626,802.01
5. Step 5: Solve for x
   x = 1,140,626,802.01/39,063.76
6. Step 6: Final answer
   x = 29,199.10