Finding the Fourth Proportional to 1,020,840.72, 1,408,841.55 and 591,128.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020,840.72 : 1,408,841.55 = 591,128.43 : x
2. Step 2: Convert to fraction form
   1,020,840.72/1,408,841.55 = 591,128.43/x
3. Step 3: Cross multiply
   1,020,840.72x = 1,408,841.55 × 591,128.43
4. Step 4: Simplify right side
   1,020,840.72x = 832,806,293,570.27
5. Step 5: Solve for x
   x = 832,806,293,570.27/1,020,840.72
6. Step 6: Final answer
   x = 815,804.34