Finding the Fourth Proportional to 85,914.72, 128,908.80 and 46,499.76

Step by Step Solution

1. Step 1: Write the proportion equation
   85,914.72 : 128,908.80 = 46,499.76 : x
2. Step 2: Convert to fraction form
   85,914.72/128,908.80 = 46,499.76/x
3. Step 3: Cross multiply
   85,914.72x = 128,908.80 × 46,499.76
4. Step 4: Simplify right side
   85,914.72x = 5,994,228,261.89
5. Step 5: Solve for x
   x = 5,994,228,261.89/85,914.72
6. Step 6: Final answer
   x = 69,769.51