Finding the Fourth Proportional to 35,404.10, 48,840.57 and 21,990.95

Step by Step Solution

1. Step 1: Write the proportion equation
   35,404.10 : 48,840.57 = 21,990.95 : x
2. Step 2: Convert to fraction form
   35,404.10/48,840.57 = 21,990.95/x
3. Step 3: Cross multiply
   35,404.10x = 48,840.57 × 21,990.95
4. Step 4: Simplify right side
   35,404.10x = 1,074,050,288.64
5. Step 5: Solve for x
   x = 1,074,050,288.64/35,404.10
6. Step 6: Final answer
   x = 30,336.89