Finding the Fourth Proportional to 35,393.09, 53,034.54 and 13,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   35,393.09 : 53,034.54 = 13,200.50 : x
2. Step 2: Convert to fraction form
   35,393.09/53,034.54 = 13,200.50/x
3. Step 3: Cross multiply
   35,393.09x = 53,034.54 × 13,200.50
4. Step 4: Simplify right side
   35,393.09x = 700,082,445.27
5. Step 5: Solve for x
   x = 700,082,445.27/35,393.09
6. Step 6: Final answer
   x = 19,780.20