Finding the Fourth Proportional to 56,145, 77,480.10 and 30,994.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,145 : 77,480.10 = 30,994.68 : x
2. Step 2: Convert to fraction form
   56,145/77,480.10 = 30,994.68/x
3. Step 3: Cross multiply
   56,145x = 77,480.10 × 30,994.68
4. Step 4: Simplify right side
   56,145x = 2,401,470,905.87
5. Step 5: Solve for x
   x = 2,401,470,905.87/56,145
6. Step 6: Final answer
   x = 42,772.66