Finding the Fourth Proportional to 8,990.02, 12,407.15 and 5,213.00

Step by Step Solution

1. Step 1: Write the proportion equation
   8,990.02 : 12,407.15 = 5,213.00 : x
2. Step 2: Convert to fraction form
   8,990.02/12,407.15 = 5,213.00/x
3. Step 3: Cross multiply
   8,990.02x = 12,407.15 × 5,213.00
4. Step 4: Simplify right side
   8,990.02x = 64,678,517.00
5. Step 5: Solve for x
   x = 64,678,517.00/8,990.02
6. Step 6: Final answer
   x = 7,194.48