Finding the Fourth Proportional to 4,978.61, 7,476.35 and 4,779.96

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.61 : 7,476.35 = 4,779.96 : x
2. Step 2: Convert to fraction form
   4,978.61/7,476.35 = 4,779.96/x
3. Step 3: Cross multiply
   4,978.61x = 7,476.35 × 4,779.96
4. Step 4: Simplify right side
   4,978.61x = 35,736,670.95
5. Step 5: Solve for x
   x = 35,736,670.95/4,978.61
6. Step 6: Final answer
   x = 7,178.04