Finding the Fourth Proportional to 91,466.76, 136,645.89 and 57,918.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91,466.76 : 136,645.89 = 57,918.18 : x
2. Step 2: Convert to fraction form
   91,466.76/136,645.89 = 57,918.18/x
3. Step 3: Cross multiply
   91,466.76x = 136,645.89 × 57,918.18
4. Step 4: Simplify right side
   91,466.76x = 7,914,281,253.28
5. Step 5: Solve for x
   x = 7,914,281,253.28/91,466.76
6. Step 6: Final answer
   x = 86,526.31