Finding the Fourth Proportional to 28,665,579.18, 39,562,404.18 and 16,908,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   28,665,579.18 : 39,562,404.18 = 16,908,168.78 : x
2. Step 2: Convert to fraction form
   28,665,579.18/39,562,404.18 = 16,908,168.78/x
3. Step 3: Cross multiply
   28,665,579.18x = 39,562,404.18 × 16,908,168.78
4. Step 4: Simplify right side
   28,665,579.18x = 668,927,807,218,017.50
5. Step 5: Solve for x
   x = 668,927,807,218,017.50/28,665,579.18
6. Step 6: Final answer
   x = 23,335,576.20