Finding the Fourth Proportional to 83,445, 115,156.80 and 45,721.68

Step by Step Solution

1. Step 1: Write the proportion equation
   83,445 : 115,156.80 = 45,721.68 : x
2. Step 2: Convert to fraction form
   83,445/115,156.80 = 45,721.68/x
3. Step 3: Cross multiply
   83,445x = 115,156.80 × 45,721.68
4. Step 4: Simplify right side
   83,445x = 5,265,162,359.42
5. Step 5: Solve for x
   x = 5,265,162,359.42/83,445
6. Step 6: Final answer
   x = 63,097.40