Finding the Fourth Proportional to 22,345.58, 33,507.77 and 12,988.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,345.58 : 33,507.77 = 12,988.31 : x
2. Step 2: Convert to fraction form
   22,345.58/33,507.77 = 12,988.31/x
3. Step 3: Cross multiply
   22,345.58x = 33,507.77 × 12,988.31
4. Step 4: Simplify right side
   22,345.58x = 435,209,071.69
5. Step 5: Solve for x
   x = 435,209,071.69/22,345.58
6. Step 6: Final answer
   x = 19,476.29