Finding the Fourth Proportional to 148,986.72, 205,601.76 and 81,918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   148,986.72 : 205,601.76 = 81,918.72 : x
2. Step 2: Convert to fraction form
   148,986.72/205,601.76 = 81,918.72/x
3. Step 3: Cross multiply
   148,986.72x = 205,601.76 × 81,918.72
4. Step 4: Simplify right side
   148,986.72x = 16,842,633,008.95
5. Step 5: Solve for x
   x = 16,842,633,008.95/148,986.72
6. Step 6: Final answer
   x = 113,047.88