Finding the Fourth Proportional to 460,978, 636,149.64 and 249,010

Step by Step Solution

1. Step 1: Write the proportion equation
   460,978 : 636,149.64 = 249,010 : x
2. Step 2: Convert to fraction form
   460,978/636,149.64 = 249,010/x
3. Step 3: Cross multiply
   460,978x = 636,149.64 × 249,010
4. Step 4: Simplify right side
   460,978x = 158,407,621,856.40
5. Step 5: Solve for x
   x = 158,407,621,856.40/460,978
6. Step 6: Final answer
   x = 343,633.80