Finding the Fourth Proportional to 79,878.12, 110,182.98 and 51,188.16

Step by Step Solution

1. Step 1: Write the proportion equation
   79,878.12 : 110,182.98 = 51,188.16 : x
2. Step 2: Convert to fraction form
   79,878.12/110,182.98 = 51,188.16/x
3. Step 3: Cross multiply
   79,878.12x = 110,182.98 × 51,188.16
4. Step 4: Simplify right side
   79,878.12x = 5,640,064,009.52
5. Step 5: Solve for x
   x = 5,640,064,009.52/79,878.12
6. Step 6: Final answer
   x = 70,608.37