Finding the Fourth Proportional to 21,006,280.17, 28,998,351.59 and 12,303,251.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,006,280.17 : 28,998,351.59 = 12,303,251.37 : x
2. Step 2: Convert to fraction form
   21,006,280.17/28,998,351.59 = 12,303,251.37/x
3. Step 3: Cross multiply
   21,006,280.17x = 28,998,351.59 × 12,303,251.37
4. Step 4: Simplify right side
   21,006,280.17x = 356,774,008,865,892.94
5. Step 5: Solve for x
   x = 356,774,008,865,892.94/21,006,280.17
6. Step 6: Final answer
   x = 16,984,159.31