Finding the Fourth Proportional to 83,570.15, 115,328.37 and 51,288.59

Step by Step Solution

1. Step 1: Write the proportion equation
   83,570.15 : 115,328.37 = 51,288.59 : x
2. Step 2: Convert to fraction form
   83,570.15/115,328.37 = 51,288.59/x
3. Step 3: Cross multiply
   83,570.15x = 115,328.37 × 51,288.59
4. Step 4: Simplify right side
   83,570.15x = 5,915,029,964.95
5. Step 5: Solve for x
   x = 5,915,029,964.95/83,570.15
6. Step 6: Final answer
   x = 70,779.22