Finding the Fourth Proportional to 23,420.23, 32,320.40 and 12,810.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,420.23 : 32,320.40 = 12,810.55 : x
2. Step 2: Convert to fraction form
   23,420.23/32,320.40 = 12,810.55/x
3. Step 3: Cross multiply
   23,420.23x = 32,320.40 × 12,810.55
4. Step 4: Simplify right side
   23,420.23x = 414,042,100.22
5. Step 5: Solve for x
   x = 414,042,100.22/23,420.23
6. Step 6: Final answer
   x = 17,678.82