Finding the Fourth Proportional to 1,056,784.98, 1,458,371.52 and 621,085.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056,784.98 : 1,458,371.52 = 621,085.32 : x
2. Step 2: Convert to fraction form
   1,056,784.98/1,458,371.52 = 621,085.32/x
3. Step 3: Cross multiply
   1,056,784.98x = 1,458,371.52 × 621,085.32
4. Step 4: Simplify right side
   1,056,784.98x = 905,773,142,178.09
5. Step 5: Solve for x
   x = 905,773,142,178.09/1,056,784.98
6. Step 6: Final answer
   x = 857,102.59