Finding the Fourth Proportional to 2,430.05, 3,642.72 and 785.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,430.05 : 3,642.72 = 785.48 : x
2. Step 2: Convert to fraction form
   2,430.05/3,642.72 = 785.48/x
3. Step 3: Cross multiply
   2,430.05x = 3,642.72 × 785.48
4. Step 4: Simplify right side
   2,430.05x = 2,861,265.49
5. Step 5: Solve for x
   x = 2,861,265.49/2,430.05
6. Step 6: Final answer
   x = 1,177.45