Finding the Fourth Proportional to 132,407.28, 182,722.91 and 71,978.45

Step by Step Solution

1. Step 1: Write the proportion equation
   132,407.28 : 182,722.91 = 71,978.45 : x
2. Step 2: Convert to fraction form
   132,407.28/182,722.91 = 71,978.45/x
3. Step 3: Cross multiply
   132,407.28x = 182,722.91 × 71,978.45
4. Step 4: Simplify right side
   132,407.28x = 13,152,110,567.78
5. Step 5: Solve for x
   x = 13,152,110,567.78/132,407.28
6. Step 6: Final answer
   x = 99,330.72