Finding the Fourth Proportional to 85,883.34, 128,693.63 and 45,908.01

Step by Step Solution

1. Step 1: Write the proportion equation
   85,883.34 : 128,693.63 = 45,908.01 : x
2. Step 2: Convert to fraction form
   85,883.34/128,693.63 = 45,908.01/x
3. Step 3: Cross multiply
   85,883.34x = 128,693.63 × 45,908.01
4. Step 4: Simplify right side
   85,883.34x = 5,908,068,452.98
5. Step 5: Solve for x
   x = 5,908,068,452.98/85,883.34
6. Step 6: Final answer
   x = 68,791.79