Finding the Fourth Proportional to 1,181,601.51, 1,630,601.77 and 645,057.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181,601.51 : 1,630,601.77 = 645,057.51 : x
2. Step 2: Convert to fraction form
   1,181,601.51/1,630,601.77 = 645,057.51/x
3. Step 3: Cross multiply
   1,181,601.51x = 1,630,601.77 × 645,057.51
4. Step 4: Simplify right side
   1,181,601.51x = 1,051,831,906,179.50
5. Step 5: Solve for x
   x = 1,051,831,906,179.50/1,181,601.51
6. Step 6: Final answer
   x = 890,174.82