Finding the Fourth Proportional to 83,630.88, 115,411.48 and 45,390.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,630.88 : 115,411.48 = 45,390.78 : x
2. Step 2: Convert to fraction form
   83,630.88/115,411.48 = 45,390.78/x
3. Step 3: Cross multiply
   83,630.88x = 115,411.48 × 45,390.78
4. Step 4: Simplify right side
   83,630.88x = 5,238,617,240.00
5. Step 5: Solve for x
   x = 5,238,617,240.00/83,630.88
6. Step 6: Final answer
   x = 62,639.75