Finding the Fourth Proportional to 387,250.50, 580,738.29 and 113,620.34

Step by Step Solution

1. Step 1: Write the proportion equation
   387,250.50 : 580,738.29 = 113,620.34 : x
2. Step 2: Convert to fraction form
   387,250.50/580,738.29 = 113,620.34/x
3. Step 3: Cross multiply
   387,250.50x = 580,738.29 × 113,620.34
4. Step 4: Simplify right side
   387,250.50x = 65,983,681,960.82
5. Step 5: Solve for x
   x = 65,983,681,960.82/387,250.50
6. Step 6: Final answer
   x = 170,390.18