Finding the Fourth Proportional to 1,071,522.47, 1,478,593.34 and 641,791.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071,522.47 : 1,478,593.34 = 641,791.55 : x
2. Step 2: Convert to fraction form
   1,071,522.47/1,478,593.34 = 641,791.55/x
3. Step 3: Cross multiply
   1,071,522.47x = 1,478,593.34 × 641,791.55
4. Step 4: Simplify right side
   1,071,522.47x = 948,948,714,392.52
5. Step 5: Solve for x
   x = 948,948,714,392.52/1,071,522.47
6. Step 6: Final answer
   x = 885,607.85