Finding the Fourth Proportional to 42,989.33, 64,452.71 and 28,914.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,989.33 : 64,452.71 = 28,914.37 : x
2. Step 2: Convert to fraction form
   42,989.33/64,452.71 = 28,914.37/x
3. Step 3: Cross multiply
   42,989.33x = 64,452.71 × 28,914.37
4. Step 4: Simplify right side
   42,989.33x = 1,863,609,415.60
5. Step 5: Solve for x
   x = 1,863,609,415.60/42,989.33
6. Step 6: Final answer
   x = 43,350.51