Finding the Fourth Proportional to 82,688.47, 123,934.28 and 47,554.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82,688.47 : 123,934.28 = 47,554.31 : x
2. Step 2: Convert to fraction form
   82,688.47/123,934.28 = 47,554.31/x
3. Step 3: Cross multiply
   82,688.47x = 123,934.28 × 47,554.31
4. Step 4: Simplify right side
   82,688.47x = 5,893,609,242.81
5. Step 5: Solve for x
   x = 5,893,609,242.81/82,688.47
6. Step 6: Final answer
   x = 71,274.86