Finding the Fourth Proportional to 103,290.84, 142,535.52 and 57,964.59

Step by Step Solution

1. Step 1: Write the proportion equation
   103,290.84 : 142,535.52 = 57,964.59 : x
2. Step 2: Convert to fraction form
   103,290.84/142,535.52 = 57,964.59/x
3. Step 3: Cross multiply
   103,290.84x = 142,535.52 × 57,964.59
4. Step 4: Simplify right side
   103,290.84x = 8,262,012,977.24
5. Step 5: Solve for x
   x = 8,262,012,977.24/103,290.84
6. Step 6: Final answer
   x = 79,987.86