Finding the Fourth Proportional to 137,108.69, 205,642.18 and 52,856.56

Step by Step Solution

1. Step 1: Write the proportion equation
   137,108.69 : 205,642.18 = 52,856.56 : x
2. Step 2: Convert to fraction form
   137,108.69/205,642.18 = 52,856.56/x
3. Step 3: Cross multiply
   137,108.69x = 205,642.18 × 52,856.56
4. Step 4: Simplify right side
   137,108.69x = 10,869,537,579.45
5. Step 5: Solve for x
   x = 10,869,537,579.45/137,108.69
6. Step 6: Final answer
   x = 79,276.80