Finding the Fourth Proportional to 22,051.20, 30,430.08 and 13,098.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,051.20 : 30,430.08 = 13,098.72 : x
2. Step 2: Convert to fraction form
   22,051.20/30,430.08 = 13,098.72/x
3. Step 3: Cross multiply
   22,051.20x = 30,430.08 × 13,098.72
4. Step 4: Simplify right side
   22,051.20x = 398,595,097.50
5. Step 5: Solve for x
   x = 398,595,097.50/22,051.20
6. Step 6: Final answer
   x = 18,075.89