Finding the Fourth Proportional to 13,328,978.16, 18,394,014.81 and 7,448,612.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,328,978.16 : 18,394,014.81 = 7,448,612.39 : x
2. Step 2: Convert to fraction form
   13,328,978.16/18,394,014.81 = 7,448,612.39/x
3. Step 3: Cross multiply
   13,328,978.16x = 18,394,014.81 × 7,448,612.39
4. Step 4: Simplify right side
   13,328,978.16x = 137,009,886,620,549.27
5. Step 5: Solve for x
   x = 137,009,886,620,549.27/13,328,978.16
6. Step 6: Final answer
   x = 10,279,099.04