Finding the Fourth Proportional to 1,153,404.88, 1,591,743.78 and 637,185.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153,404.88 : 1,591,743.78 = 637,185.40 : x
2. Step 2: Convert to fraction form
   1,153,404.88/1,591,743.78 = 637,185.40/x
3. Step 3: Cross multiply
   1,153,404.88x = 1,591,743.78 × 637,185.40
4. Step 4: Simplify right side
   1,153,404.88x = 1,014,235,897,156.81
5. Step 5: Solve for x
   x = 1,014,235,897,156.81/1,153,404.88
6. Step 6: Final answer
   x = 879,340.74