Finding the Fourth Proportional to 12,126.32, 18,189.72 and 5,200.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,126.32 : 18,189.72 = 5,200.88 : x
2. Step 2: Convert to fraction form
   12,126.32/18,189.72 = 5,200.88/x
3. Step 3: Cross multiply
   12,126.32x = 18,189.72 × 5,200.88
4. Step 4: Simplify right side
   12,126.32x = 94,602,550.95
5. Step 5: Solve for x
   x = 94,602,550.95/12,126.32
6. Step 6: Final answer
   x = 7,801.42