Finding the Fourth Proportional to 22,705.35, 31,332.89 and 13,145.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,705.35 : 31,332.89 = 13,145.64 : x
2. Step 2: Convert to fraction form
   22,705.35/31,332.89 = 13,145.64/x
3. Step 3: Cross multiply
   22,705.35x = 31,332.89 × 13,145.64
4. Step 4: Simplify right side
   22,705.35x = 411,890,892.10
5. Step 5: Solve for x
   x = 411,890,892.10/22,705.35
6. Step 6: Final answer
   x = 18,140.70