Finding the Fourth Proportional to 106,978.10, 160,418.55 and 47,783.30

Step by Step Solution

1. Step 1: Write the proportion equation
   106,978.10 : 160,418.55 = 47,783.30 : x
2. Step 2: Convert to fraction form
   106,978.10/160,418.55 = 47,783.30/x
3. Step 3: Cross multiply
   106,978.10x = 160,418.55 × 47,783.30
4. Step 4: Simplify right side
   106,978.10x = 7,665,327,700.22
5. Step 5: Solve for x
   x = 7,665,327,700.22/106,978.10
6. Step 6: Final answer
   x = 71,653.24