Finding the Fourth Proportional to 9,263.78, 12,784.38 and 5,072.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,263.78 : 12,784.38 = 5,072.03 : x
2. Step 2: Convert to fraction form
   9,263.78/12,784.38 = 5,072.03/x
3. Step 3: Cross multiply
   9,263.78x = 12,784.38 × 5,072.03
4. Step 4: Simplify right side
   9,263.78x = 64,842,758.89
5. Step 5: Solve for x
   x = 64,842,758.89/9,263.78
6. Step 6: Final answer
   x = 6,999.60