Finding the Fourth Proportional to 102,904.02, 142,002.72 and 57,587.76

Step by Step Solution

1. Step 1: Write the proportion equation
   102,904.02 : 142,002.72 = 57,587.76 : x
2. Step 2: Convert to fraction form
   102,904.02/142,002.72 = 57,587.76/x
3. Step 3: Cross multiply
   102,904.02x = 142,002.72 × 57,587.76
4. Step 4: Simplify right side
   102,904.02x = 8,177,618,558.71
5. Step 5: Solve for x
   x = 8,177,618,558.71/102,904.02
6. Step 6: Final answer
   x = 79,468.41