Finding the Fourth Proportional to 12,976,103.60, 17,906,253.56 and 7,174,430

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976,103.60 : 17,906,253.56 = 7,174,430 : x
2. Step 2: Convert to fraction form
   12,976,103.60/17,906,253.56 = 7,174,430/x
3. Step 3: Cross multiply
   12,976,103.60x = 17,906,253.56 × 7,174,430
4. Step 4: Simplify right side
   12,976,103.60x = 128,467,162,728,470.80
5. Step 5: Solve for x
   x = 128,467,162,728,470.80/12,976,103.60
6. Step 6: Final answer
   x = 9,900,288.00