Finding the Fourth Proportional to 22,830.19, 31,505.61 and 12,758.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,830.19 : 31,505.61 = 12,758.64 : x
2. Step 2: Convert to fraction form
   22,830.19/31,505.61 = 12,758.64/x
3. Step 3: Cross multiply
   22,830.19x = 31,505.61 × 12,758.64
4. Step 4: Simplify right side
   22,830.19x = 401,968,682.51
5. Step 5: Solve for x
   x = 401,968,682.51/22,830.19
6. Step 6: Final answer
   x = 17,606.89