Finding the Fourth Proportional to 82,729.90, 124,146.15 and 43,315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82,729.90 : 124,146.15 = 43,315.30 : x
2. Step 2: Convert to fraction form
   82,729.90/124,146.15 = 43,315.30/x
3. Step 3: Cross multiply
   82,729.90x = 124,146.15 × 43,315.30
4. Step 4: Simplify right side
   82,729.90x = 5,377,427,731.10
5. Step 5: Solve for x
   x = 5,377,427,731.10/82,729.90
6. Step 6: Final answer
   x = 64,999.81