Finding the Fourth Proportional to 105,779.04, 145,978.98 and 62,780.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,779.04 : 145,978.98 = 62,780.82 : x
2. Step 2: Convert to fraction form
   105,779.04/145,978.98 = 62,780.82/x
3. Step 3: Cross multiply
   105,779.04x = 145,978.98 × 62,780.82
4. Step 4: Simplify right side
   105,779.04x = 9,164,680,067.16
5. Step 5: Solve for x
   x = 9,164,680,067.16/105,779.04
6. Step 6: Final answer
   x = 86,639.85