Finding the Fourth Proportional to 116,870.40, 161,296.02 and 76,618.08

Step by Step Solution

1. Step 1: Write the proportion equation
   116,870.40 : 161,296.02 = 76,618.08 : x
2. Step 2: Convert to fraction form
   116,870.40/161,296.02 = 76,618.08/x
3. Step 3: Cross multiply
   116,870.40x = 161,296.02 × 76,618.08
4. Step 4: Simplify right side
   116,870.40x = 12,358,191,364.04
5. Step 5: Solve for x
   x = 12,358,191,364.04/116,870.40
6. Step 6: Final answer
   x = 105,742.70