Finding the Fourth Proportional to 1,144,078.78, 1,578,848.10 and 627,880.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144,078.78 : 1,578,848.10 = 627,880.71 : x
2. Step 2: Convert to fraction form
   1,144,078.78/1,578,848.10 = 627,880.71/x
3. Step 3: Cross multiply
   1,144,078.78x = 1,578,848.10 × 627,880.71
4. Step 4: Simplify right side
   1,144,078.78x = 991,328,254,976.51
5. Step 5: Solve for x
   x = 991,328,254,976.51/1,144,078.78
6. Step 6: Final answer
   x = 866,486.01