Finding the Fourth Proportional to 278,269.02, 417,410.82 and 78,610.50

Step by Step Solution

1. Step 1: Write the proportion equation
   278,269.02 : 417,410.82 = 78,610.50 : x
2. Step 2: Convert to fraction form
   278,269.02/417,410.82 = 78,610.50/x
3. Step 3: Cross multiply
   278,269.02x = 417,410.82 × 78,610.50
4. Step 4: Simplify right side
   278,269.02x = 32,812,873,265.61
5. Step 5: Solve for x
   x = 32,812,873,265.61/278,269.02
6. Step 6: Final answer
   x = 117,917.81