Finding the Fourth Proportional to 66,830.72, 92,128.73 and 50,887.49

Step by Step Solution

1. Step 1: Write the proportion equation
   66,830.72 : 92,128.73 = 50,887.49 : x
2. Step 2: Convert to fraction form
   66,830.72/92,128.73 = 50,887.49/x
3. Step 3: Cross multiply
   66,830.72x = 92,128.73 × 50,887.49
4. Step 4: Simplify right side
   66,830.72x = 4,688,199,111.51
5. Step 5: Solve for x
   x = 4,688,199,111.51/66,830.72
6. Step 6: Final answer
   x = 70,150.37