Finding the Fourth Proportional to 69,998.42, 105,041.37 and 28,445.42

Step by Step Solution

1. Step 1: Write the proportion equation
   69,998.42 : 105,041.37 = 28,445.42 : x
2. Step 2: Convert to fraction form
   69,998.42/105,041.37 = 28,445.42/x
3. Step 3: Cross multiply
   69,998.42x = 105,041.37 × 28,445.42
4. Step 4: Simplify right side
   69,998.42x = 2,987,945,361.82
5. Step 5: Solve for x
   x = 2,987,945,361.82/69,998.42
6. Step 6: Final answer
   x = 42,685.90