Finding the Fourth Proportional to 8,978.02, 12,389.70 and 5,000.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.02 : 12,389.70 = 5,000.02 : x
2. Step 2: Convert to fraction form
   8,978.02/12,389.70 = 5,000.02/x
3. Step 3: Cross multiply
   8,978.02x = 12,389.70 × 5,000.02
4. Step 4: Simplify right side
   8,978.02x = 61,948,747.79
5. Step 5: Solve for x
   x = 61,948,747.79/8,978.02
6. Step 6: Final answer
   x = 6,900.05