Finding the Fourth Proportional to 109,404.10, 164,106.15 and 91,908.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,404.10 : 164,106.15 = 91,908.10 : x
2. Step 2: Convert to fraction form
   109,404.10/164,106.15 = 91,908.10/x
3. Step 3: Cross multiply
   109,404.10x = 164,106.15 × 91,908.10
4. Step 4: Simplify right side
   109,404.10x = 15,082,684,444.82
5. Step 5: Solve for x
   x = 15,082,684,444.82/109,404.10
6. Step 6: Final answer
   x = 137,862.15