Finding the Fourth Proportional to 69,990.37, 105,029.10 and 28,437.37

Step by Step Solution

1. Step 1: Write the proportion equation
   69,990.37 : 105,029.10 = 28,437.37 : x
2. Step 2: Convert to fraction form
   69,990.37/105,029.10 = 28,437.37/x
3. Step 3: Cross multiply
   69,990.37x = 105,029.10 × 28,437.37
4. Step 4: Simplify right side
   69,990.37x = 2,986,751,114.89
5. Step 5: Solve for x
   x = 2,986,751,114.89/69,990.37
6. Step 6: Final answer
   x = 42,673.75