Finding the Fourth Proportional to 21,130,369.31, 31,624,929.96 and 12,030,023.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,130,369.31 : 31,624,929.96 = 12,030,023.88 : x
2. Step 2: Convert to fraction form
   21,130,369.31/31,624,929.96 = 12,030,023.88/x
3. Step 3: Cross multiply
   21,130,369.31x = 31,624,929.96 × 12,030,023.88
4. Step 4: Simplify right side
   21,130,369.31x = 380,448,662,622,127.50
5. Step 5: Solve for x
   x = 380,448,662,622,127.50/21,130,369.31
6. Step 6: Final answer
   x = 18,004,827.89