Finding the Fourth Proportional to 35,513.87, 53,256.94 and 13,315.13

Step by Step Solution

1. Step 1: Write the proportion equation
   35,513.87 : 53,256.94 = 13,315.13 : x
2. Step 2: Convert to fraction form
   35,513.87/53,256.94 = 13,315.13/x
3. Step 3: Cross multiply
   35,513.87x = 53,256.94 × 13,315.13
4. Step 4: Simplify right side
   35,513.87x = 709,123,079.50
5. Step 5: Solve for x
   x = 709,123,079.50/35,513.87
6. Step 6: Final answer
   x = 19,967.50