Finding the Fourth Proportional to 1,128,654.72, 1,557,588.42 and 619,375.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,654.72 : 1,557,588.42 = 619,375.32 : x
2. Step 2: Convert to fraction form
   1,128,654.72/1,557,588.42 = 619,375.32/x
3. Step 3: Cross multiply
   1,128,654.72x = 1,557,588.42 × 619,375.32
4. Step 4: Simplify right side
   1,128,654.72x = 964,731,826,065.79
5. Step 5: Solve for x
   x = 964,731,826,065.79/1,128,654.72
6. Step 6: Final answer
   x = 854,762.59