Finding the Fourth Proportional to 1,155,698.44, 1,594,910.85 and 639,443.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,698.44 : 1,594,910.85 = 639,443.93 : x
2. Step 2: Convert to fraction form
   1,155,698.44/1,594,910.85 = 639,443.93/x
3. Step 3: Cross multiply
   1,155,698.44x = 1,594,910.85 × 639,443.93
4. Step 4: Simplify right side
   1,155,698.44x = 1,019,856,064,312.31
5. Step 5: Solve for x
   x = 1,019,856,064,312.31/1,155,698.44
6. Step 6: Final answer
   x = 882,458.63