Finding the Fourth Proportional to 21,501.64, 29,675.16 and 12,070.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,501.64 : 29,675.16 = 12,070.72 : x
2. Step 2: Convert to fraction form
   21,501.64/29,675.16 = 12,070.72/x
3. Step 3: Cross multiply
   21,501.64x = 29,675.16 × 12,070.72
4. Step 4: Simplify right side
   21,501.64x = 358,200,547.32
5. Step 5: Solve for x
   x = 358,200,547.32/21,501.64
6. Step 6: Final answer
   x = 16,659.22