Finding the Fourth Proportional to 1,337,978.16, 2,006,889.48 and 978,513.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337,978.16 : 2,006,889.48 = 978,513.12 : x
2. Step 2: Convert to fraction form
   1,337,978.16/2,006,889.48 = 978,513.12/x
3. Step 3: Cross multiply
   1,337,978.16x = 2,006,889.48 × 978,513.12
4. Step 4: Simplify right side
   1,337,978.16x = 1,963,767,686,569.98
5. Step 5: Solve for x
   x = 1,963,767,686,569.98/1,337,978.16
6. Step 6: Final answer
   x = 1,467,712.81