Finding the Fourth Proportional to 5,878.17, 8,784.72 and 4,783.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,878.17 : 8,784.72 = 4,783.86 : x
2. Step 2: Convert to fraction form
   5,878.17/8,784.72 = 4,783.86/x
3. Step 3: Cross multiply
   5,878.17x = 8,784.72 × 4,783.86
4. Step 4: Simplify right side
   5,878.17x = 42,024,870.62
5. Step 5: Solve for x
   x = 42,024,870.62/5,878.17
6. Step 6: Final answer
   x = 7,149.31