Finding the Fourth Proportional to 136,492.09, 188,258.81 and 90,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,492.09 : 188,258.81 = 90,468.50 : x
2. Step 2: Convert to fraction form
   136,492.09/188,258.81 = 90,468.50/x
3. Step 3: Cross multiply
   136,492.09x = 188,258.81 × 90,468.50
4. Step 4: Simplify right side
   136,492.09x = 17,031,490,758.85
5. Step 5: Solve for x
   x = 17,031,490,758.85/136,492.09
6. Step 6: Final answer
   x = 124,780.06