Finding the Fourth Proportional to 21,641.02, 29,864.48 and 12,080.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,641.02 : 29,864.48 = 12,080.35 : x
2. Step 2: Convert to fraction form
   21,641.02/29,864.48 = 12,080.35/x
3. Step 3: Cross multiply
   21,641.02x = 29,864.48 × 12,080.35
4. Step 4: Simplify right side
   21,641.02x = 360,773,475.83
5. Step 5: Solve for x
   x = 360,773,475.83/21,641.02
6. Step 6: Final answer
   x = 16,670.82