Finding the Fourth Proportional to 83,669.20, 115,420.71 and 53,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,669.20 : 115,420.71 = 53,422.72 : x
2. Step 2: Convert to fraction form
   83,669.20/115,420.71 = 53,422.72/x
3. Step 3: Cross multiply
   83,669.20x = 115,420.71 × 53,422.72
4. Step 4: Simplify right side
   83,669.20x = 6,166,088,184.31
5. Step 5: Solve for x
   x = 6,166,088,184.31/83,669.20
6. Step 6: Final answer
   x = 73,696.04