Finding the Fourth Proportional to 60,902.31, 91,330.71 and 20,909.94

Step by Step Solution

1. Step 1: Write the proportion equation
   60,902.31 : 91,330.71 = 20,909.94 : x
2. Step 2: Convert to fraction form
   60,902.31/91,330.71 = 20,909.94/x
3. Step 3: Cross multiply
   60,902.31x = 91,330.71 × 20,909.94
4. Step 4: Simplify right side
   60,902.31x = 1,909,719,871.30
5. Step 5: Solve for x
   x = 1,909,719,871.30/60,902.31
6. Step 6: Final answer
   x = 31,357.10