Finding the Fourth Proportional to 231,054.42, 346,494.12 and 90,736.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,054.42 : 346,494.12 = 90,736.50 : x
2. Step 2: Convert to fraction form
   231,054.42/346,494.12 = 90,736.50/x
3. Step 3: Cross multiply
   231,054.42x = 346,494.12 × 90,736.50
4. Step 4: Simplify right side
   231,054.42x = 31,439,663,719.38
5. Step 5: Solve for x
   x = 31,439,663,719.38/231,054.42
6. Step 6: Final answer
   x = 136,070.38