Finding the Fourth Proportional to 12,621.42, 17,417.58 and 7,319.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.42 : 17,417.58 = 7,319.34 : x
2. Step 2: Convert to fraction form
   12,621.42/17,417.58 = 7,319.34/x
3. Step 3: Cross multiply
   12,621.42x = 17,417.58 × 7,319.34
4. Step 4: Simplify right side
   12,621.42x = 127,485,190.00
5. Step 5: Solve for x
   x = 127,485,190.00/12,621.42
6. Step 6: Final answer
   x = 10,100.70