Finding the Fourth Proportional to 83,490.42, 115,224.78 and 47,685.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,490.42 : 115,224.78 = 47,685.78 : x
2. Step 2: Convert to fraction form
   83,490.42/115,224.78 = 47,685.78/x
3. Step 3: Cross multiply
   83,490.42x = 115,224.78 × 47,685.78
4. Step 4: Simplify right side
   83,490.42x = 5,494,583,509.63
5. Step 5: Solve for x
   x = 5,494,583,509.63/83,490.42
6. Step 6: Final answer
   x = 65,810.95