Finding the Fourth Proportional to 109,418.09, 164,061.45 and 42,778.83

Step by Step Solution

1. Step 1: Write the proportion equation
   109,418.09 : 164,061.45 = 42,778.83 : x
2. Step 2: Convert to fraction form
   109,418.09/164,061.45 = 42,778.83/x
3. Step 3: Cross multiply
   109,418.09x = 164,061.45 × 42,778.83
4. Step 4: Simplify right side
   109,418.09x = 7,018,357,494.33
5. Step 5: Solve for x
   x = 7,018,357,494.33/109,418.09
6. Step 6: Final answer
   x = 64,142.57