Finding the Fourth Proportional to 28,600.68, 42,897.34 and 8,878.76

Step by Step Solution

1. Step 1: Write the proportion equation
   28,600.68 : 42,897.34 = 8,878.76 : x
2. Step 2: Convert to fraction form
   28,600.68/42,897.34 = 8,878.76/x
3. Step 3: Cross multiply
   28,600.68x = 42,897.34 × 8,878.76
4. Step 4: Simplify right side
   28,600.68x = 380,875,186.50
5. Step 5: Solve for x
   x = 380,875,186.50/28,600.68
6. Step 6: Final answer
   x = 13,317.00