Finding the Fourth Proportional to 109,912.62, 164,813.49 and 78,304.62

Step by Step Solution

1. Step 1: Write the proportion equation
   109,912.62 : 164,813.49 = 78,304.62 : x
2. Step 2: Convert to fraction form
   109,912.62/164,813.49 = 78,304.62/x
3. Step 3: Cross multiply
   109,912.62x = 164,813.49 × 78,304.62
4. Step 4: Simplify right side
   109,912.62x = 12,905,657,705.32
5. Step 5: Solve for x
   x = 12,905,657,705.32/109,912.62
6. Step 6: Final answer
   x = 117,417.43