Finding the Fourth Proportional to 55,611, 76,743.20 and 30,461.40

Step by Step Solution

1. Step 1: Write the proportion equation
   55,611 : 76,743.20 = 30,461.40 : x
2. Step 2: Convert to fraction form
   55,611/76,743.20 = 30,461.40/x
3. Step 3: Cross multiply
   55,611x = 76,743.20 × 30,461.40
4. Step 4: Simplify right side
   55,611x = 2,337,705,312.48
5. Step 5: Solve for x
   x = 2,337,705,312.48/55,611
6. Step 6: Final answer
   x = 42,036.74