Finding the Fourth Proportional to 22,728,081.60, 31,356,972.72 and 12,936,075.84

Step by Step Solution

1. Step 1: Write the proportion equation
   22,728,081.60 : 31,356,972.72 = 12,936,075.84 : x
2. Step 2: Convert to fraction form
   22,728,081.60/31,356,972.72 = 12,936,075.84/x
3. Step 3: Cross multiply
   22,728,081.60x = 31,356,972.72 × 12,936,075.84
4. Step 4: Simplify right side
   22,728,081.60x = 405,636,177,218,731.06
5. Step 5: Solve for x
   x = 405,636,177,218,731.06/22,728,081.60
6. Step 6: Final answer
   x = 17,847,356.60