Finding the Fourth Proportional to 166,978.12, 230,427.30 and 91,526.76

Step by Step Solution

1. Step 1: Write the proportion equation
   166,978.12 : 230,427.30 = 91,526.76 : x
2. Step 2: Convert to fraction form
   166,978.12/230,427.30 = 91,526.76/x
3. Step 3: Cross multiply
   166,978.12x = 230,427.30 × 91,526.76
4. Step 4: Simplify right side
   166,978.12x = 21,090,264,184.55
5. Step 5: Solve for x
   x = 21,090,264,184.55/166,978.12
6. Step 6: Final answer
   x = 126,305.56