Finding the Fourth Proportional to 8,070.38, 12,128.25 and 4,783.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,070.38 : 12,128.25 = 4,783.94 : x
2. Step 2: Convert to fraction form
   8,070.38/12,128.25 = 4,783.94/x
3. Step 3: Cross multiply
   8,070.38x = 12,128.25 × 4,783.94
4. Step 4: Simplify right side
   8,070.38x = 58,020,820.31
5. Step 5: Solve for x
   x = 58,020,820.31/8,070.38
6. Step 6: Final answer
   x = 7,189.35