Finding the Fourth Proportional to 23,131,063.89, 31,921,058.34 and 12,817,959.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,131,063.89 : 31,921,058.34 = 12,817,959.21 : x
2. Step 2: Convert to fraction form
   23,131,063.89/31,921,058.34 = 12,817,959.21/x
3. Step 3: Cross multiply
   23,131,063.89x = 31,921,058.34 × 12,817,959.21
4. Step 4: Simplify right side
   23,131,063.89x = 409,162,823,742,150.31
5. Step 5: Solve for x
   x = 409,162,823,742,150.31/23,131,063.89
6. Step 6: Final answer
   x = 17,688,889.09