Finding the Fourth Proportional to 82,978.50, 114,518.98 and 51,146.58

Step by Step Solution

1. Step 1: Write the proportion equation
   82,978.50 : 114,518.98 = 51,146.58 : x
2. Step 2: Convert to fraction form
   82,978.50/114,518.98 = 51,146.58/x
3. Step 3: Cross multiply
   82,978.50x = 114,518.98 × 51,146.58
4. Step 4: Simplify right side
   82,978.50x = 5,857,254,172.09
5. Step 5: Solve for x
   x = 5,857,254,172.09/82,978.50
6. Step 6: Final answer
   x = 70,587.61