Finding the Fourth Proportional to 1,145,570, 1,580,886.72 and 636,319.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145,570 : 1,580,886.72 = 636,319.76 : x
2. Step 2: Convert to fraction form
   1,145,570/1,580,886.72 = 636,319.76/x
3. Step 3: Cross multiply
   1,145,570x = 1,580,886.72 × 636,319.76
4. Step 4: Simplify right side
   1,145,570x = 1,005,949,458,257.59
5. Step 5: Solve for x
   x = 1,005,949,458,257.59/1,145,570
6. Step 6: Final answer
   x = 878,121.34