Finding the Fourth Proportional to 101,985, 140,748.12 and 56,662.16

Step by Step Solution

1. Step 1: Write the proportion equation
   101,985 : 140,748.12 = 56,662.16 : x
2. Step 2: Convert to fraction form
   101,985/140,748.12 = 56,662.16/x
3. Step 3: Cross multiply
   101,985x = 140,748.12 × 56,662.16
4. Step 4: Simplify right side
   101,985x = 7,975,092,495.14
5. Step 5: Solve for x
   x = 7,975,092,495.14/101,985
6. Step 6: Final answer
   x = 78,198.68