Finding the Fourth Proportional to 1,137,961.51, 1,570,495.52 and 621,793.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,961.51 : 1,570,495.52 = 621,793.89 : x
2. Step 2: Convert to fraction form
   1,137,961.51/1,570,495.52 = 621,793.89/x
3. Step 3: Cross multiply
   1,137,961.51x = 1,570,495.52 × 621,793.89
4. Step 4: Simplify right side
   1,137,961.51x = 976,524,520,162.86
5. Step 5: Solve for x
   x = 976,524,520,162.86/1,137,961.51
6. Step 6: Final answer
   x = 858,134.93