Finding the Fourth Proportional to 9,622.34, 13,279.20 and 5,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,622.34 : 13,279.20 = 5,430.50 : x
2. Step 2: Convert to fraction form
   9,622.34/13,279.20 = 5,430.50/x
3. Step 3: Cross multiply
   9,622.34x = 13,279.20 × 5,430.50
4. Step 4: Simplify right side
   9,622.34x = 72,112,695.60
5. Step 5: Solve for x
   x = 72,112,695.60/9,622.34
6. Step 6: Final answer
   x = 7,494.30