Finding the Fourth Proportional to 55,881.31, 77,114.67 and 30,730.81

Step by Step Solution

1. Step 1: Write the proportion equation
   55,881.31 : 77,114.67 = 30,730.81 : x
2. Step 2: Convert to fraction form
   55,881.31/77,114.67 = 30,730.81/x
3. Step 3: Cross multiply
   55,881.31x = 77,114.67 × 30,730.81
4. Step 4: Simplify right side
   55,881.31x = 2,369,796,271.98
5. Step 5: Solve for x
   x = 2,369,796,271.98/55,881.31
6. Step 6: Final answer
   x = 42,407.67