Finding the Fourth Proportional to 132,816, 183,288.72 and 72,386.40

Step by Step Solution

1. Step 1: Write the proportion equation
   132,816 : 183,288.72 = 72,386.40 : x
2. Step 2: Convert to fraction form
   132,816/183,288.72 = 72,386.40/x
3. Step 3: Cross multiply
   132,816x = 183,288.72 × 72,386.40
4. Step 4: Simplify right side
   132,816x = 13,267,610,601.41
5. Step 5: Solve for x
   x = 13,267,610,601.41/132,816
6. Step 6: Final answer
   x = 99,894.67