Finding the Fourth Proportional to 116,991.60, 161,448.12 and 63,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   116,991.60 : 161,448.12 = 63,276.12 : x
2. Step 2: Convert to fraction form
   116,991.60/161,448.12 = 63,276.12/x
3. Step 3: Cross multiply
   116,991.60x = 161,448.12 × 63,276.12
4. Step 4: Simplify right side
   116,991.60x = 10,215,810,614.89
5. Step 5: Solve for x
   x = 10,215,810,614.89/116,991.60
6. Step 6: Final answer
   x = 87,320.89