Finding the Fourth Proportional to 12,309,089.51, 18,447,128.91 and 9,579,932.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309,089.51 : 18,447,128.91 = 9,579,932.21 : x
2. Step 2: Convert to fraction form
   12,309,089.51/18,447,128.91 = 9,579,932.21/x
3. Step 3: Cross multiply
   12,309,089.51x = 18,447,128.91 × 9,579,932.21
4. Step 4: Simplify right side
   12,309,089.51x = 176,722,244,359,615.69
5. Step 5: Solve for x
   x = 176,722,244,359,615.69/12,309,089.51
6. Step 6: Final answer
   x = 14,357,052.50