Finding the Fourth Proportional to 91,086.12, 136,643.76 and 38,510.64

Step by Step Solution

1. Step 1: Write the proportion equation
   91,086.12 : 136,643.76 = 38,510.64 : x
2. Step 2: Convert to fraction form
   91,086.12/136,643.76 = 38,510.64/x
3. Step 3: Cross multiply
   91,086.12x = 136,643.76 × 38,510.64
4. Step 4: Simplify right side
   91,086.12x = 5,262,238,649.61
5. Step 5: Solve for x
   x = 5,262,238,649.61/91,086.12
6. Step 6: Final answer
   x = 57,772.12