Finding the Fourth Proportional to 153,131.31, 211,304.30 and 91,874.25

Step by Step Solution

1. Step 1: Write the proportion equation
   153,131.31 : 211,304.30 = 91,874.25 : x
2. Step 2: Convert to fraction form
   153,131.31/211,304.30 = 91,874.25/x
3. Step 3: Cross multiply
   153,131.31x = 211,304.30 × 91,874.25
4. Step 4: Simplify right side
   153,131.31x = 19,413,423,624.90
5. Step 5: Solve for x
   x = 19,413,423,624.90/153,131.31
6. Step 6: Final answer
   x = 126,776.32