Finding the Third Proportional to 917,580 and 2,159,138

Step by Step Solution

1. Step 1: Write the proportion equation
   917,580 : 2,159,138 = 2,159,138 : x
2. Step 2: Convert to fraction form
   917,580/2,159,138 = 2,159,138/x
3. Step 3: Cross multiply
   917,580x = 2,159,138 × 2,159,138
4. Step 4: Simplify right side
   917,580x = 4,661,876,903,044
5. Step 5: Solve for x
   x = 4,661,876,903,044/917,580
6. Step 6: Final answer
   x = 5,080,621.75