Finding the Fourth Proportional to 12,477.99, 17,219.46 and 7,100.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.99 : 17,219.46 = 7,100.30 : x
2. Step 2: Convert to fraction form
   12,477.99/17,219.46 = 7,100.30/x
3. Step 3: Cross multiply
   12,477.99x = 17,219.46 × 7,100.30
4. Step 4: Simplify right side
   12,477.99x = 122,263,331.84
5. Step 5: Solve for x
   x = 122,263,331.84/12,477.99
6. Step 6: Final answer
   x = 9,798.32