Finding the Fourth Proportional to 78,702.12, 118,021.86 and 28,770.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,702.12 : 118,021.86 = 28,770.84 : x
2. Step 2: Convert to fraction form
   78,702.12/118,021.86 = 28,770.84/x
3. Step 3: Cross multiply
   78,702.12x = 118,021.86 × 28,770.84
4. Step 4: Simplify right side
   78,702.12x = 3,395,588,050.56
5. Step 5: Solve for x
   x = 3,395,588,050.56/78,702.12
6. Step 6: Final answer
   x = 43,144.81