Finding the Fourth Proportional to 105,761.58, 145,927.37 and 62,719.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,761.58 : 145,927.37 = 62,719.20 : x
2. Step 2: Convert to fraction form
   105,761.58/145,927.37 = 62,719.20/x
3. Step 3: Cross multiply
   105,761.58x = 145,927.37 × 62,719.20
4. Step 4: Simplify right side
   105,761.58x = 9,152,447,904.50
5. Step 5: Solve for x
   x = 9,152,447,904.50/105,761.58
6. Step 6: Final answer
   x = 86,538.49