Finding the Fourth Proportional to 291,640.50, 437,630.85 and 123,150.78

Step by Step Solution

1. Step 1: Write the proportion equation
   291,640.50 : 437,630.85 = 123,150.78 : x
2. Step 2: Convert to fraction form
   291,640.50/437,630.85 = 123,150.78/x
3. Step 3: Cross multiply
   291,640.50x = 437,630.85 × 123,150.78
4. Step 4: Simplify right side
   291,640.50x = 53,894,580,529.56
5. Step 5: Solve for x
   x = 53,894,580,529.56/291,640.50
6. Step 6: Final answer
   x = 184,798.00