Finding the Fourth Proportional to 231,326.34, 346,991.98 and 81,538.72

Step by Step Solution

1. Step 1: Write the proportion equation
   231,326.34 : 346,991.98 = 81,538.72 : x
2. Step 2: Convert to fraction form
   231,326.34/346,991.98 = 81,538.72/x
3. Step 3: Cross multiply
   231,326.34x = 346,991.98 × 81,538.72
4. Step 4: Simplify right side
   231,326.34x = 28,293,281,899.47
5. Step 5: Solve for x
   x = 28,293,281,899.47/231,326.34
6. Step 6: Final answer
   x = 122,308.95