Finding the Fourth Proportional to 61,808, 91,916.88 and 59,839.76

Step by Step Solution

1. Step 1: Write the proportion equation
   61,808 : 91,916.88 = 59,839.76 : x
2. Step 2: Convert to fraction form
   61,808/91,916.88 = 59,839.76/x
3. Step 3: Cross multiply
   61,808x = 91,916.88 × 59,839.76
4. Step 4: Simplify right side
   61,808x = 5,500,284,039.15
5. Step 5: Solve for x
   x = 5,500,284,039.15/61,808
6. Step 6: Final answer
   x = 88,989.84