Finding the Fourth Proportional to 136,572.78, 204,856.72 and 52,310.10

Step by Step Solution

1. Step 1: Write the proportion equation
   136,572.78 : 204,856.72 = 52,310.10 : x
2. Step 2: Convert to fraction form
   136,572.78/204,856.72 = 52,310.10/x
3. Step 3: Cross multiply
   136,572.78x = 204,856.72 × 52,310.10
4. Step 4: Simplify right side
   136,572.78x = 10,716,075,508.87
5. Step 5: Solve for x
   x = 10,716,075,508.87/136,572.78
6. Step 6: Final answer
   x = 78,464.21