Finding the Fourth Proportional to 78,109.11, 107,790.03 and 42,298.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.11 : 107,790.03 = 42,298.30 : x
2. Step 2: Convert to fraction form
   78,109.11/107,790.03 = 42,298.30/x
3. Step 3: Cross multiply
   78,109.11x = 107,790.03 × 42,298.30
4. Step 4: Simplify right side
   78,109.11x = 4,559,335,025.95
5. Step 5: Solve for x
   x = 4,559,335,025.95/78,109.11
6. Step 6: Final answer
   x = 58,371.36