Finding the Fourth Proportional to 123,156.72, 169,947.72 and 72,846

Step by Step Solution

1. Step 1: Write the proportion equation
   123,156.72 : 169,947.72 = 72,846 : x
2. Step 2: Convert to fraction form
   123,156.72/169,947.72 = 72,846/x
3. Step 3: Cross multiply
   123,156.72x = 169,947.72 × 72,846
4. Step 4: Simplify right side
   123,156.72x = 12,380,011,611.12
5. Step 5: Solve for x
   x = 12,380,011,611.12/123,156.72
6. Step 6: Final answer
   x = 100,522.42