Finding the Fourth Proportional to 460,978.58, 691,018.83 and 208,322.66

Step by Step Solution

1. Step 1: Write the proportion equation
   460,978.58 : 691,018.83 = 208,322.66 : x
2. Step 2: Convert to fraction form
   460,978.58/691,018.83 = 208,322.66/x
3. Step 3: Cross multiply
   460,978.58x = 691,018.83 × 208,322.66
4. Step 4: Simplify right side
   460,978.58x = 143,954,877,320.59
5. Step 5: Solve for x
   x = 143,954,877,320.59/460,978.58
6. Step 6: Final answer
   x = 312,281.06