Finding the Fourth Proportional to 123,630.94, 185,294.40 and 56,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,630.94 : 185,294.40 = 56,978.56 : x
2. Step 2: Convert to fraction form
   123,630.94/185,294.40 = 56,978.56/x
3. Step 3: Cross multiply
   123,630.94x = 185,294.40 × 56,978.56
4. Step 4: Simplify right side
   123,630.94x = 10,557,808,088.06
5. Step 5: Solve for x
   x = 10,557,808,088.06/123,630.94
6. Step 6: Final answer
   x = 85,397.78