Finding the Fourth Proportional to 35,200, 52,802.56 and 13,312

Step by Step Solution

1. Step 1: Write the proportion equation
   35,200 : 52,802.56 = 13,312 : x
2. Step 2: Convert to fraction form
   35,200/52,802.56 = 13,312/x
3. Step 3: Cross multiply
   35,200x = 52,802.56 × 13,312
4. Step 4: Simplify right side
   35,200x = 702,907,678.72
5. Step 5: Solve for x
   x = 702,907,678.72/35,200
6. Step 6: Final answer
   x = 19,968.97