Finding the Fourth Proportional to 767,139, 1,058,665.72 and 427,570.80

Step by Step Solution

1. Step 1: Write the proportion equation
   767,139 : 1,058,665.72 = 427,570.80 : x
2. Step 2: Convert to fraction form
   767,139/1,058,665.72 = 427,570.80/x
3. Step 3: Cross multiply
   767,139x = 1,058,665.72 × 427,570.80
4. Step 4: Simplify right side
   767,139x = 452,654,548,832.98
5. Step 5: Solve for x
   x = 452,654,548,832.98/767,139
6. Step 6: Final answer
   x = 590,055.45