Finding the Fourth Proportional to 136,490.59, 188,256.74 and 90,467.00

Step by Step Solution

1. Step 1: Write the proportion equation
   136,490.59 : 188,256.74 = 90,467.00 : x
2. Step 2: Convert to fraction form
   136,490.59/188,256.74 = 90,467.00/x
3. Step 3: Cross multiply
   136,490.59x = 188,256.74 × 90,467.00
4. Step 4: Simplify right side
   136,490.59x = 17,031,021,103.96
5. Step 5: Solve for x
   x = 17,031,021,103.96/136,490.59
6. Step 6: Final answer
   x = 124,777.99