Finding the Fourth Proportional to 200,457.51, 300,622.61 and 65,490.83

Step by Step Solution

1. Step 1: Write the proportion equation
   200,457.51 : 300,622.61 = 65,490.83 : x
2. Step 2: Convert to fraction form
   200,457.51/300,622.61 = 65,490.83/x
3. Step 3: Cross multiply
   200,457.51x = 300,622.61 × 65,490.83
4. Step 4: Simplify right side
   200,457.51x = 19,688,022,415.10
5. Step 5: Solve for x
   x = 19,688,022,415.10/200,457.51
6. Step 6: Final answer
   x = 98,215.44