Finding the Fourth Proportional to 136,574.78, 204,859.72 and 52,312.10

Step by Step Solution

1. Step 1: Write the proportion equation
   136,574.78 : 204,859.72 = 52,312.10 : x
2. Step 2: Convert to fraction form
   136,574.78/204,859.72 = 52,312.10/x
3. Step 3: Cross multiply
   136,574.78x = 204,859.72 × 52,312.10
4. Step 4: Simplify right side
   136,574.78x = 10,716,642,158.61
5. Step 5: Solve for x
   x = 10,716,642,158.61/136,574.78
6. Step 6: Final answer
   x = 78,467.21