Finding the Fourth Proportional to 56,141.46, 77,475.03 and 30,990.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,141.46 : 77,475.03 = 30,990.78 : x
2. Step 2: Convert to fraction form
   56,141.46/77,475.03 = 30,990.78/x
3. Step 3: Cross multiply
   56,141.46x = 77,475.03 × 30,990.78
4. Step 4: Simplify right side
   56,141.46x = 2,401,011,610.22
5. Step 5: Solve for x
   x = 2,401,011,610.22/56,141.46
6. Step 6: Final answer
   x = 42,767.17