Finding the Fourth Proportional to 69,989.52, 105,027.82 and 28,436.52

Step by Step Solution

1. Step 1: Write the proportion equation
   69,989.52 : 105,027.82 = 28,436.52 : x
2. Step 2: Convert to fraction form
   69,989.52/105,027.82 = 28,436.52/x
3. Step 3: Cross multiply
   69,989.52x = 105,027.82 × 28,436.52
4. Step 4: Simplify right side
   69,989.52x = 2,986,626,186.70
5. Step 5: Solve for x
   x = 2,986,626,186.70/69,989.52
6. Step 6: Final answer
   x = 42,672.47