Finding the Fourth Proportional to 1,201,978.06, 1,658,729.93 and 658,147.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201,978.06 : 1,658,729.93 = 658,147.55 : x
2. Step 2: Convert to fraction form
   1,201,978.06/1,658,729.93 = 658,147.55/x
3. Step 3: Cross multiply
   1,201,978.06x = 1,658,729.93 × 658,147.55
4. Step 4: Simplify right side
   1,201,978.06x = 1,091,689,027,956.78
5. Step 5: Solve for x
   x = 1,091,689,027,956.78/1,201,978.06
6. Step 6: Final answer
   x = 908,243.72