Finding the Fourth Proportional to 1,411,608.72, 2,116,222.16 and 612,288.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411,608.72 : 2,116,222.16 = 612,288.48 : x
2. Step 2: Convert to fraction form
   1,411,608.72/2,116,222.16 = 612,288.48/x
3. Step 3: Cross multiply
   1,411,608.72x = 2,116,222.16 × 612,288.48
4. Step 4: Simplify right side
   1,411,608.72x = 1,295,738,449,688.72
5. Step 5: Solve for x
   x = 1,295,738,449,688.72/1,411,608.72
6. Step 6: Final answer
   x = 917,916.16