Finding the Fourth Proportional to 121,815.98, 182,725.98 and 42,931.16

Step by Step Solution

1. Step 1: Write the proportion equation
   121,815.98 : 182,725.98 = 42,931.16 : x
2. Step 2: Convert to fraction form
   121,815.98/182,725.98 = 42,931.16/x
3. Step 3: Cross multiply
   121,815.98x = 182,725.98 × 42,931.16
4. Step 4: Simplify right side
   121,815.98x = 7,844,638,283.54
5. Step 5: Solve for x
   x = 7,844,638,283.54/121,815.98
6. Step 6: Final answer
   x = 64,397.45