Finding the Fourth Proportional to 56,196.76, 77,556.90 and 30,707

Step by Step Solution

1. Step 1: Write the proportion equation
   56,196.76 : 77,556.90 = 30,707 : x
2. Step 2: Convert to fraction form
   56,196.76/77,556.90 = 30,707/x
3. Step 3: Cross multiply
   56,196.76x = 77,556.90 × 30,707
4. Step 4: Simplify right side
   56,196.76x = 2,381,539,728.30
5. Step 5: Solve for x
   x = 2,381,539,728.30/56,196.76
6. Step 6: Final answer
   x = 42,378.59