Finding the Fourth Proportional to 90,969.48, 136,468.82 and 38,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,969.48 : 136,468.82 = 38,386.72 : x
2. Step 2: Convert to fraction form
   90,969.48/136,468.82 = 38,386.72/x
3. Step 3: Cross multiply
   90,969.48x = 136,468.82 × 38,386.72
4. Step 4: Simplify right side
   90,969.48x = 5,238,590,382.07
5. Step 5: Solve for x
   x = 5,238,590,382.07/90,969.48
6. Step 6: Final answer
   x = 57,586.24