Finding the Fourth Proportional to 68,376.32, 102,390.24 and 57,878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   68,376.32 : 102,390.24 = 57,878.72 : x
2. Step 2: Convert to fraction form
   68,376.32/102,390.24 = 57,878.72/x
3. Step 3: Cross multiply
   68,376.32x = 102,390.24 × 57,878.72
4. Step 4: Simplify right side
   68,376.32x = 5,926,216,031.69
5. Step 5: Solve for x
   x = 5,926,216,031.69/68,376.32
6. Step 6: Final answer
   x = 86,670.59