Finding the Fourth Proportional to 35,705.20, 53,562.52 and 13,212.82

Step by Step Solution

1. Step 1: Write the proportion equation
   35,705.20 : 53,562.52 = 13,212.82 : x
2. Step 2: Convert to fraction form
   35,705.20/53,562.52 = 13,212.82/x
3. Step 3: Cross multiply
   35,705.20x = 53,562.52 × 13,212.82
4. Step 4: Simplify right side
   35,705.20x = 707,711,935.51
5. Step 5: Solve for x
   x = 707,711,935.51/35,705.20
6. Step 6: Final answer
   x = 19,820.98