Finding the Fourth Proportional to 78,109.29, 107,790.29 and 42,298.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.29 : 107,790.29 = 42,298.49 : x
2. Step 2: Convert to fraction form
   78,109.29/107,790.29 = 42,298.49/x
3. Step 3: Cross multiply
   78,109.29x = 107,790.29 × 42,298.49
4. Step 4: Simplify right side
   78,109.29x = 4,559,365,753.22
5. Step 5: Solve for x
   x = 4,559,365,753.22/78,109.29
6. Step 6: Final answer
   x = 58,371.62