Finding the Fourth Proportional to 231,404.50, 346,973.91 and 91,086.58

Step by Step Solution

1. Step 1: Write the proportion equation
   231,404.50 : 346,973.91 = 91,086.58 : x
2. Step 2: Convert to fraction form
   231,404.50/346,973.91 = 91,086.58/x
3. Step 3: Cross multiply
   231,404.50x = 346,973.91 × 91,086.58
4. Step 4: Simplify right side
   231,404.50x = 31,604,666,811.13
5. Step 5: Solve for x
   x = 31,604,666,811.13/231,404.50
6. Step 6: Final answer
   x = 136,577.58