Finding the Fourth Proportional to 91,968.79, 137,931.32 and 25,407.46

Step by Step Solution

1. Step 1: Write the proportion equation
   91,968.79 : 137,931.32 = 25,407.46 : x
2. Step 2: Convert to fraction form
   91,968.79/137,931.32 = 25,407.46/x
3. Step 3: Cross multiply
   91,968.79x = 137,931.32 × 25,407.46
4. Step 4: Simplify right side
   91,968.79x = 3,504,484,368.61
5. Step 5: Solve for x
   x = 3,504,484,368.61/91,968.79
6. Step 6: Final answer
   x = 38,105.15