Finding the Fourth Proportional to 105,422.76, 145,489.86 and 60,725.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,422.76 : 145,489.86 = 60,725.16 : x
2. Step 2: Convert to fraction form
   105,422.76/145,489.86 = 60,725.16/x
3. Step 3: Cross multiply
   105,422.76x = 145,489.86 × 60,725.16
4. Step 4: Simplify right side
   105,422.76x = 8,834,895,026.88
5. Step 5: Solve for x
   x = 8,834,895,026.88/105,422.76
6. Step 6: Final answer
   x = 83,804.44