Finding the Fourth Proportional to 66,083.18, 91,172.59 and 42,223.82

Step by Step Solution

1. Step 1: Write the proportion equation
   66,083.18 : 91,172.59 = 42,223.82 : x
2. Step 2: Convert to fraction form
   66,083.18/91,172.59 = 42,223.82/x
3. Step 3: Cross multiply
   66,083.18x = 91,172.59 × 42,223.82
4. Step 4: Simplify right side
   66,083.18x = 3,849,654,467.67
5. Step 5: Solve for x
   x = 3,849,654,467.67/66,083.18
6. Step 6: Final answer
   x = 58,254.68