Finding the Fourth Proportional to 12,978,487.28, 17,904,902.64 and 7,470,544.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,487.28 : 17,904,902.64 = 7,470,544.16 : x
2. Step 2: Convert to fraction form
   12,978,487.28/17,904,902.64 = 7,470,544.16/x
3. Step 3: Cross multiply
   12,978,487.28x = 17,904,902.64 × 7,470,544.16
4. Step 4: Simplify right side
   12,978,487.28x = 133,759,365,852,620.59
5. Step 5: Solve for x
   x = 133,759,365,852,620.59/12,978,487.28
6. Step 6: Final answer
   x = 10,306,237.00