Finding the Fourth Proportional to 56,111, 77,433.18 and 30,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,111 : 77,433.18 = 30,960.50 : x
2. Step 2: Convert to fraction form
   56,111/77,433.18 = 30,960.50/x
3. Step 3: Cross multiply
   56,111x = 77,433.18 × 30,960.50
4. Step 4: Simplify right side
   56,111x = 2,397,369,969.39
5. Step 5: Solve for x
   x = 2,397,369,969.39/56,111
6. Step 6: Final answer
   x = 42,725.49