Finding the Fourth Proportional to 124,914.72, 187,240.86 and 45,978.60

Step by Step Solution

1. Step 1: Write the proportion equation
   124,914.72 : 187,240.86 = 45,978.60 : x
2. Step 2: Convert to fraction form
   124,914.72/187,240.86 = 45,978.60/x
3. Step 3: Cross multiply
   124,914.72x = 187,240.86 × 45,978.60
4. Step 4: Simplify right side
   124,914.72x = 8,609,072,605.60
5. Step 5: Solve for x
   x = 8,609,072,605.60/124,914.72
6. Step 6: Final answer
   x = 68,919.60