Finding the Fourth Proportional to 56,081.81, 77,390.16 and 33,420.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,081.81 : 77,390.16 = 33,420.30 : x
2. Step 2: Convert to fraction form
   56,081.81/77,390.16 = 33,420.30/x
3. Step 3: Cross multiply
   56,081.81x = 77,390.16 × 33,420.30
4. Step 4: Simplify right side
   56,081.81x = 2,586,401,948.71
5. Step 5: Solve for x
   x = 2,586,401,948.71/56,081.81
6. Step 6: Final answer
   x = 46,118.37