Finding the Fourth Proportional to 113,611, 156,783.72 and 65,892.64

Step by Step Solution

1. Step 1: Write the proportion equation
   113,611 : 156,783.72 = 65,892.64 : x
2. Step 2: Convert to fraction form
   113,611/156,783.72 = 65,892.64/x
3. Step 3: Cross multiply
   113,611x = 156,783.72 × 65,892.64
4. Step 4: Simplify right side
   113,611x = 10,330,893,219.82
5. Step 5: Solve for x
   x = 10,330,893,219.82/113,611
6. Step 6: Final answer
   x = 90,932.16