Finding the Fourth Proportional to 116,675.58, 161,001.91 and 64,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,675.58 : 161,001.91 = 64,988.72 : x
2. Step 2: Convert to fraction form
   116,675.58/161,001.91 = 64,988.72/x
3. Step 3: Cross multiply
   116,675.58x = 161,001.91 × 64,988.72
4. Step 4: Simplify right side
   116,675.58x = 10,463,308,048.46
5. Step 5: Solve for x
   x = 10,463,308,048.46/116,675.58
6. Step 6: Final answer
   x = 89,678.65