Finding the Fourth Proportional to 619,603.89, 927,600.59 and 460,385.51

Step by Step Solution

1. Step 1: Write the proportion equation
   619,603.89 : 927,600.59 = 460,385.51 : x
2. Step 2: Convert to fraction form
   619,603.89/927,600.59 = 460,385.51/x
3. Step 3: Cross multiply
   619,603.89x = 927,600.59 × 460,385.51
4. Step 4: Simplify right side
   619,603.89x = 427,053,863,763.52
5. Step 5: Solve for x
   x = 427,053,863,763.52/619,603.89
6. Step 6: Final answer
   x = 689,236.90