Finding the Fourth Proportional to 55,840.50, 77,059.89 and 30,690

Step by Step Solution

1. Step 1: Write the proportion equation
   55,840.50 : 77,059.89 = 30,690 : x
2. Step 2: Convert to fraction form
   55,840.50/77,059.89 = 30,690/x
3. Step 3: Cross multiply
   55,840.50x = 77,059.89 × 30,690
4. Step 4: Simplify right side
   55,840.50x = 2,364,968,024.10
5. Step 5: Solve for x
   x = 2,364,968,024.10/55,840.50
6. Step 6: Final answer
   x = 42,352.20