Finding the Fourth Proportional to 12,010,209, 17,970,112.26 and 8,422,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,010,209 : 17,970,112.26 = 8,422,978.20 : x
2. Step 2: Convert to fraction form
   12,010,209/17,970,112.26 = 8,422,978.20/x
3. Step 3: Cross multiply
   12,010,209x = 17,970,112.26 × 8,422,978.20
4. Step 4: Simplify right side
   12,010,209x = 151,361,863,817,532.72
5. Step 5: Solve for x
   x = 151,361,863,817,532.72/12,010,209
6. Step 6: Final answer
   x = 12,602,766.85