Finding the Fourth Proportional to 66,085.35, 99,007.74 and 58,999.47

Step by Step Solution

1. Step 1: Write the proportion equation
   66,085.35 : 99,007.74 = 58,999.47 : x
2. Step 2: Convert to fraction form
   66,085.35/99,007.74 = 58,999.47/x
3. Step 3: Cross multiply
   66,085.35x = 99,007.74 × 58,999.47
4. Step 4: Simplify right side
   66,085.35x = 5,841,404,185.90
5. Step 5: Solve for x
   x = 5,841,404,185.90/66,085.35
6. Step 6: Final answer
   x = 88,391.82