Finding the Fourth Proportional to 12,978,371.48, 17,904,743.04 and 7,470,428.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,371.48 : 17,904,743.04 = 7,470,428.36 : x
2. Step 2: Convert to fraction form
   12,978,371.48/17,904,743.04 = 7,470,428.36/x
3. Step 3: Cross multiply
   12,978,371.48x = 17,904,743.04 × 7,470,428.36
4. Step 4: Simplify right side
   12,978,371.48x = 133,756,100,184,528.61
5. Step 5: Solve for x
   x = 133,756,100,184,528.61/12,978,371.48
6. Step 6: Final answer
   x = 10,306,077.34