Finding the Fourth Proportional to 123,219.10, 185,217.45 and 113,887.90

Step by Step Solution

1. Step 1: Write the proportion equation
   123,219.10 : 185,217.45 = 113,887.90 : x
2. Step 2: Convert to fraction form
   123,219.10/185,217.45 = 113,887.90/x
3. Step 3: Cross multiply
   123,219.10x = 185,217.45 × 113,887.90
4. Step 4: Simplify right side
   123,219.10x = 21,094,026,423.86
5. Step 5: Solve for x
   x = 21,094,026,423.86/123,219.10
6. Step 6: Final answer
   x = 171,191.21