Finding the Fourth Proportional to 90,978.63, 136,488.72 and 27,807.74

Step by Step Solution

1. Step 1: Write the proportion equation
   90,978.63 : 136,488.72 = 27,807.74 : x
2. Step 2: Convert to fraction form
   90,978.63/136,488.72 = 27,807.74/x
3. Step 3: Cross multiply
   90,978.63x = 136,488.72 × 27,807.74
4. Step 4: Simplify right side
   90,978.63x = 3,795,442,838.69
5. Step 5: Solve for x
   x = 3,795,442,838.69/90,978.63
6. Step 6: Final answer
   x = 41,717.96