Finding the Fourth Proportional to 123,761.57, 185,669.34 and 70,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,761.57 : 185,669.34 = 70,478.72 : x
2. Step 2: Convert to fraction form
   123,761.57/185,669.34 = 70,478.72/x
3. Step 3: Cross multiply
   123,761.57x = 185,669.34 × 70,478.72
4. Step 4: Simplify right side
   123,761.57x = 13,085,737,426.44
5. Step 5: Solve for x
   x = 13,085,737,426.44/123,761.57
6. Step 6: Final answer
   x = 105,733.45