Finding the Fourth Proportional to 9,070.72, 12,517.86 and 5,091.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,070.72 : 12,517.86 = 5,091.79 : x
2. Step 2: Convert to fraction form
   9,070.72/12,517.86 = 5,091.79/x
3. Step 3: Cross multiply
   9,070.72x = 12,517.86 × 5,091.79
4. Step 4: Simplify right side
   9,070.72x = 63,738,314.37
5. Step 5: Solve for x
   x = 63,738,314.37/9,070.72
6. Step 6: Final answer
   x = 7,026.82