Finding the Fourth Proportional to 82,890.72, 124,372.84 and 43,438.46

Step by Step Solution

1. Step 1: Write the proportion equation
   82,890.72 : 124,372.84 = 43,438.46 : x
2. Step 2: Convert to fraction form
   82,890.72/124,372.84 = 43,438.46/x
3. Step 3: Cross multiply
   82,890.72x = 124,372.84 × 43,438.46
4. Step 4: Simplify right side
   82,890.72x = 5,402,564,215.90
5. Step 5: Solve for x
   x = 5,402,564,215.90/82,890.72
6. Step 6: Final answer
   x = 65,176.95