Finding the Fourth Proportional to 106,978.16, 160,460.76 and 28,090.64

Step by Step Solution

1. Step 1: Write the proportion equation
   106,978.16 : 160,460.76 = 28,090.64 : x
2. Step 2: Convert to fraction form
   106,978.16/160,460.76 = 28,090.64/x
3. Step 3: Cross multiply
   106,978.16x = 160,460.76 × 28,090.64
4. Step 4: Simplify right side
   106,978.16x = 4,507,445,443.29
5. Step 5: Solve for x
   x = 4,507,445,443.29/106,978.16
6. Step 6: Final answer
   x = 42,134.26