Finding the Fourth Proportional to 102,619.25, 141,615 and 57,294.59

Step by Step Solution

1. Step 1: Write the proportion equation
   102,619.25 : 141,615 = 57,294.59 : x
2. Step 2: Convert to fraction form
   102,619.25/141,615 = 57,294.59/x
3. Step 3: Cross multiply
   102,619.25x = 141,615 × 57,294.59
4. Step 4: Simplify right side
   102,619.25x = 8,113,772,654.78
5. Step 5: Solve for x
   x = 8,113,772,654.78/102,619.25
6. Step 6: Final answer
   x = 79,066.77