Finding the Fourth Proportional to 136,507.63, 188,325 and 90,588.88

Step by Step Solution

1. Step 1: Write the proportion equation
   136,507.63 : 188,325 = 90,588.88 : x
2. Step 2: Convert to fraction form
   136,507.63/188,325 = 90,588.88/x
3. Step 3: Cross multiply
   136,507.63x = 188,325 × 90,588.88
4. Step 4: Simplify right side
   136,507.63x = 17,060,151,061.41
5. Step 5: Solve for x
   x = 17,060,151,061.41/136,507.63
6. Step 6: Final answer
   x = 124,975.81