Finding the Fourth Proportional to 66,598.54, 99,411.98 and 58,190.89

Step by Step Solution

1. Step 1: Write the proportion equation
   66,598.54 : 99,411.98 = 58,190.89 : x
2. Step 2: Convert to fraction form
   66,598.54/99,411.98 = 58,190.89/x
3. Step 3: Cross multiply
   66,598.54x = 99,411.98 × 58,190.89
4. Step 4: Simplify right side
   66,598.54x = 5,784,871,244.88
5. Step 5: Solve for x
   x = 5,784,871,244.88/66,598.54
6. Step 6: Final answer
   x = 86,861.84