Finding the Fourth Proportional to 101,420.56, 139,961.42 and 56,098.63

Step by Step Solution

1. Step 1: Write the proportion equation
   101,420.56 : 139,961.42 = 56,098.63 : x
2. Step 2: Convert to fraction form
   101,420.56/139,961.42 = 56,098.63/x
3. Step 3: Cross multiply
   101,420.56x = 139,961.42 × 56,098.63
4. Step 4: Simplify right side
   101,420.56x = 7,851,643,914.85
5. Step 5: Solve for x
   x = 7,851,643,914.85/101,420.56
6. Step 6: Final answer
   x = 77,416.69