Finding the Fourth Proportional to 82,881.60, 114,386.40 and 47,082.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,881.60 : 114,386.40 = 47,082.72 : x
2. Step 2: Convert to fraction form
   82,881.60/114,386.40 = 47,082.72/x
3. Step 3: Cross multiply
   82,881.60x = 114,386.40 × 47,082.72
4. Step 4: Simplify right side
   82,881.60x = 5,385,622,843.01
5. Step 5: Solve for x
   x = 5,385,622,843.01/82,881.60
6. Step 6: Final answer
   x = 64,979.72