Finding the Fourth Proportional to 83,385.76, 115,072.39 and 45,145.31

Step by Step Solution

1. Step 1: Write the proportion equation
   83,385.76 : 115,072.39 = 45,145.31 : x
2. Step 2: Convert to fraction form
   83,385.76/115,072.39 = 45,145.31/x
3. Step 3: Cross multiply
   83,385.76x = 115,072.39 × 45,145.31
4. Step 4: Simplify right side
   83,385.76x = 5,194,978,718.99
5. Step 5: Solve for x
   x = 5,194,978,718.99/83,385.76
6. Step 6: Final answer
   x = 62,300.55