Finding the Fourth Proportional to 70,522.38, 105,762.24 and 28,388.88

Step by Step Solution

1. Step 1: Write the proportion equation
   70,522.38 : 105,762.24 = 28,388.88 : x
2. Step 2: Convert to fraction form
   70,522.38/105,762.24 = 28,388.88/x
3. Step 3: Cross multiply
   70,522.38x = 105,762.24 × 28,388.88
4. Step 4: Simplify right side
   70,522.38x = 3,002,471,539.89
5. Step 5: Solve for x
   x = 3,002,471,539.89/70,522.38
6. Step 6: Final answer
   x = 42,574.73