Finding the Fourth Proportional to 2,953.59, 4,430.45 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,953.59 : 4,430.45 = 978.58 : x
2. Step 2: Convert to fraction form
   2,953.59/4,430.45 = 978.58/x
3. Step 3: Cross multiply
   2,953.59x = 4,430.45 × 978.58
4. Step 4: Simplify right side
   2,953.59x = 4,335,549.76
5. Step 5: Solve for x
   x = 4,335,549.76/2,953.59
6. Step 6: Final answer
   x = 1,467.89