Finding the Fourth Proportional to 58,017.00, 86,890.55 and 56,420.70

Step by Step Solution

1. Step 1: Write the proportion equation
   58,017.00 : 86,890.55 = 56,420.70 : x
2. Step 2: Convert to fraction form
   58,017.00/86,890.55 = 56,420.70/x
3. Step 3: Cross multiply
   58,017.00x = 86,890.55 × 56,420.70
4. Step 4: Simplify right side
   58,017.00x = 4,902,425,583.86
5. Step 5: Solve for x
   x = 4,902,425,583.86/58,017.00
6. Step 6: Final answer
   x = 84,499.82