Finding the Fourth Proportional to 116,141.60, 174,094.79 and 78,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,141.60 : 174,094.79 = 78,705.50 : x
2. Step 2: Convert to fraction form
   116,141.60/174,094.79 = 78,705.50/x
3. Step 3: Cross multiply
   116,141.60x = 174,094.79 × 78,705.50
4. Step 4: Simplify right side
   116,141.60x = 13,702,216,230.34
5. Step 5: Solve for x
   x = 13,702,216,230.34/116,141.60
6. Step 6: Final answer
   x = 117,978.54