Finding the Fourth Proportional to 101,380.01, 139,892.20 and 56,051.87

Step by Step Solution

1. Step 1: Write the proportion equation
   101,380.01 : 139,892.20 = 56,051.87 : x
2. Step 2: Convert to fraction form
   101,380.01/139,892.20 = 56,051.87/x
3. Step 3: Cross multiply
   101,380.01x = 139,892.20 × 56,051.87
4. Step 4: Simplify right side
   101,380.01x = 7,841,218,568.82
5. Step 5: Solve for x
   x = 7,841,218,568.82/101,380.01
6. Step 6: Final answer
   x = 77,344.82