Finding the Fourth Proportional to 116,978.56, 161,431.74 and 63,264.64

Step by Step Solution

1. Step 1: Write the proportion equation
   116,978.56 : 161,431.74 = 63,264.64 : x
2. Step 2: Convert to fraction form
   116,978.56/161,431.74 = 63,264.64/x
3. Step 3: Cross multiply
   116,978.56x = 161,431.74 × 63,264.64
4. Step 4: Simplify right side
   116,978.56x = 10,212,920,915.67
5. Step 5: Solve for x
   x = 10,212,920,915.67/116,978.56
6. Step 6: Final answer
   x = 87,305.92