Finding the Fourth Proportional to 12,870.34, 19,308.84 and 3,636.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.34 : 19,308.84 = 3,636.34 : x
2. Step 2: Convert to fraction form
   12,870.34/19,308.84 = 3,636.34/x
3. Step 3: Cross multiply
   12,870.34x = 19,308.84 × 3,636.34
4. Step 4: Simplify right side
   12,870.34x = 70,213,507.25
5. Step 5: Solve for x
   x = 70,213,507.25/12,870.34
6. Step 6: Final answer
   x = 5,455.45