Finding the Fourth Proportional to 68,071.59, 102,118.32 and 28,639.98

Step by Step Solution

1. Step 1: Write the proportion equation
   68,071.59 : 102,118.32 = 28,639.98 : x
2. Step 2: Convert to fraction form
   68,071.59/102,118.32 = 28,639.98/x
3. Step 3: Cross multiply
   68,071.59x = 102,118.32 × 28,639.98
4. Step 4: Simplify right side
   68,071.59x = 2,924,666,642.43
5. Step 5: Solve for x
   x = 2,924,666,642.43/68,071.59
6. Step 6: Final answer
   x = 42,964.57