Finding the Fourth Proportional to 9,290.14, 12,830.96 and 6,300.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.14 : 12,830.96 = 6,300.78 : x
2. Step 2: Convert to fraction form
   9,290.14/12,830.96 = 6,300.78/x
3. Step 3: Cross multiply
   9,290.14x = 12,830.96 × 6,300.78
4. Step 4: Simplify right side
   9,290.14x = 80,845,056.15
5. Step 5: Solve for x
   x = 80,845,056.15/9,290.14
6. Step 6: Final answer
   x = 8,702.24