Finding the Fourth Proportional to 109,109.67, 163,637.16 and 77,427.33

Step by Step Solution

1. Step 1: Write the proportion equation
   109,109.67 : 163,637.16 = 77,427.33 : x
2. Step 2: Convert to fraction form
   109,109.67/163,637.16 = 77,427.33/x
3. Step 3: Cross multiply
   109,109.67x = 163,637.16 × 77,427.33
4. Step 4: Simplify right side
   109,109.67x = 12,669,988,387.58
5. Step 5: Solve for x
   x = 12,669,988,387.58/109,109.67
6. Step 6: Final answer
   x = 116,121.59