Finding the Fourth Proportional to 139,877.28, 209,606.40 and 60,948.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,877.28 : 209,606.40 = 60,948.72 : x
2. Step 2: Convert to fraction form
   139,877.28/209,606.40 = 60,948.72/x
3. Step 3: Cross multiply
   139,877.28x = 209,606.40 × 60,948.72
4. Step 4: Simplify right side
   139,877.28x = 12,775,241,783.81
5. Step 5: Solve for x
   x = 12,775,241,783.81/139,877.28
6. Step 6: Final answer
   x = 91,331.79