Finding the Fourth Proportional to 101,710.36, 140,368.59 and 56,402.55

Step by Step Solution

1. Step 1: Write the proportion equation
   101,710.36 : 140,368.59 = 56,402.55 : x
2. Step 2: Convert to fraction form
   101,710.36/140,368.59 = 56,402.55/x
3. Step 3: Cross multiply
   101,710.36x = 140,368.59 × 56,402.55
4. Step 4: Simplify right side
   101,710.36x = 7,917,146,133.89
5. Step 5: Solve for x
   x = 7,917,146,133.89/101,710.36
6. Step 6: Final answer
   x = 77,840.12