Finding the Fourth Proportional to 69,990.53, 105,029.33 and 28,437.53

Step by Step Solution

1. Step 1: Write the proportion equation
   69,990.53 : 105,029.33 = 28,437.53 : x
2. Step 2: Convert to fraction form
   69,990.53/105,029.33 = 28,437.53/x
3. Step 3: Cross multiply
   69,990.53x = 105,029.33 × 28,437.53
4. Step 4: Simplify right side
   69,990.53x = 2,986,774,055.42
5. Step 5: Solve for x
   x = 2,986,774,055.42/69,990.53
6. Step 6: Final answer
   x = 42,673.98