Finding the Fourth Proportional to 2,953.86, 4,429.65 and 978.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,953.86 : 4,429.65 = 978.87 : x
2. Step 2: Convert to fraction form
   2,953.86/4,429.65 = 978.87/x
3. Step 3: Cross multiply
   2,953.86x = 4,429.65 × 978.87
4. Step 4: Simplify right side
   2,953.86x = 4,336,051.50
5. Step 5: Solve for x
   x = 4,336,051.50/2,953.86
6. Step 6: Final answer
   x = 1,467.93