Finding the Fourth Proportional to 90,180.80, 135,156.18 and 42,795.80

Step by Step Solution

1. Step 1: Write the proportion equation
   90,180.80 : 135,156.18 = 42,795.80 : x
2. Step 2: Convert to fraction form
   90,180.80/135,156.18 = 42,795.80/x
3. Step 3: Cross multiply
   90,180.80x = 135,156.18 × 42,795.80
4. Step 4: Simplify right side
   90,180.80x = 5,784,116,848.04
5. Step 5: Solve for x
   x = 5,784,116,848.04/90,180.80
6. Step 6: Final answer
   x = 64,139.12