Finding the Fourth Proportional to 121,142.83, 166,997.83 and 77,530.57

Step by Step Solution

1. Step 1: Write the proportion equation
   121,142.83 : 166,997.83 = 77,530.57 : x
2. Step 2: Convert to fraction form
   121,142.83/166,997.83 = 77,530.57/x
3. Step 3: Cross multiply
   121,142.83x = 166,997.83 × 77,530.57
4. Step 4: Simplify right side
   121,142.83x = 12,947,435,726.02
5. Step 5: Solve for x
   x = 12,947,435,726.02/121,142.83
6. Step 6: Final answer
   x = 106,877.45