Finding the Fourth Proportional to 70,556.27, 105,812.53 and 28,434.65

Step by Step Solution

1. Step 1: Write the proportion equation
   70,556.27 : 105,812.53 = 28,434.65 : x
2. Step 2: Convert to fraction form
   70,556.27/105,812.53 = 28,434.65/x
3. Step 3: Cross multiply
   70,556.27x = 105,812.53 × 28,434.65
4. Step 4: Simplify right side
   70,556.27x = 3,008,741,656.02
5. Step 5: Solve for x
   x = 3,008,741,656.02/70,556.27
6. Step 6: Final answer
   x = 42,643.15