Finding the Fourth Proportional to 66,500.82, 91,688.13 and 42,588.18

Step by Step Solution

1. Step 1: Write the proportion equation
   66,500.82 : 91,688.13 = 42,588.18 : x
2. Step 2: Convert to fraction form
   66,500.82/91,688.13 = 42,588.18/x
3. Step 3: Cross multiply
   66,500.82x = 91,688.13 × 42,588.18
4. Step 4: Simplify right side
   66,500.82x = 3,904,830,584.30
5. Step 5: Solve for x
   x = 3,904,830,584.30/66,500.82
6. Step 6: Final answer
   x = 58,718.53