Finding the Fourth Proportional to 120,887.94, 166,815.57 and 69,903.98

Step by Step Solution

1. Step 1: Write the proportion equation
   120,887.94 : 166,815.57 = 69,903.98 : x
2. Step 2: Convert to fraction form
   120,887.94/166,815.57 = 69,903.98/x
3. Step 3: Cross multiply
   120,887.94x = 166,815.57 × 69,903.98
4. Step 4: Simplify right side
   120,887.94x = 11,661,071,434.89
5. Step 5: Solve for x
   x = 11,661,071,434.89/120,887.94
6. Step 6: Final answer
   x = 96,461.83