Finding the Fourth Proportional to 267,321.10, 400,978.18 and 64,918.86

Step by Step Solution

1. Step 1: Write the proportion equation
   267,321.10 : 400,978.18 = 64,918.86 : x
2. Step 2: Convert to fraction form
   267,321.10/400,978.18 = 64,918.86/x
3. Step 3: Cross multiply
   267,321.10x = 400,978.18 × 64,918.86
4. Step 4: Simplify right side
   267,321.10x = 26,031,045,328.03
5. Step 5: Solve for x
   x = 26,031,045,328.03/267,321.10
6. Step 6: Final answer
   x = 97,377.45