Finding the Fourth Proportional to 13,373.12, 20,061.54 and 5,580.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,373.12 : 20,061.54 = 5,580.14 : x
2. Step 2: Convert to fraction form
   13,373.12/20,061.54 = 5,580.14/x
3. Step 3: Cross multiply
   13,373.12x = 20,061.54 × 5,580.14
4. Step 4: Simplify right side
   13,373.12x = 111,946,201.82
5. Step 5: Solve for x
   x = 111,946,201.82/13,373.12
6. Step 6: Final answer
   x = 8,370.99