Finding the Fourth Proportional to 105,308.41, 145,326.59 and 59,985.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,308.41 : 145,326.59 = 59,985.74 : x
2. Step 2: Convert to fraction form
   105,308.41/145,326.59 = 59,985.74/x
3. Step 3: Cross multiply
   105,308.41x = 145,326.59 × 59,985.74
4. Step 4: Simplify right side
   105,308.41x = 8,717,523,042.83
5. Step 5: Solve for x
   x = 8,717,523,042.83/105,308.41
6. Step 6: Final answer
   x = 82,780.88