Finding the Fourth Proportional to 116,672.58, 160,997.78 and 64,985.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,672.58 : 160,997.78 = 64,985.72 : x
2. Step 2: Convert to fraction form
   116,672.58/160,997.78 = 64,985.72/x
3. Step 3: Cross multiply
   116,672.58x = 160,997.78 × 64,985.72
4. Step 4: Simplify right side
   116,672.58x = 10,462,556,326.77
5. Step 5: Solve for x
   x = 10,462,556,326.77/116,672.58
6. Step 6: Final answer
   x = 89,674.51