Finding the Fourth Proportional to 35,978.53, 53,965.77 and 13,791.01

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.53 : 53,965.77 = 13,791.01 : x
2. Step 2: Convert to fraction form
   35,978.53/53,965.77 = 13,791.01/x
3. Step 3: Cross multiply
   35,978.53x = 53,965.77 × 13,791.01
4. Step 4: Simplify right side
   35,978.53x = 744,242,473.73
5. Step 5: Solve for x
   x = 744,242,473.73/35,978.53
6. Step 6: Final answer
   x = 20,685.74