Finding the Fourth Proportional to 456,978.60, 685,586.16 and 267,598.98

Step by Step Solution

1. Step 1: Write the proportion equation
   456,978.60 : 685,586.16 = 267,598.98 : x
2. Step 2: Convert to fraction form
   456,978.60/685,586.16 = 267,598.98/x
3. Step 3: Cross multiply
   456,978.60x = 685,586.16 × 267,598.98
4. Step 4: Simplify right side
   456,978.60x = 183,462,157,118.12
5. Step 5: Solve for x
   x = 183,462,157,118.12/456,978.60
6. Step 6: Final answer
   x = 401,467.72