Finding the Fourth Proportional to 101,820.86, 140,513.56 and 56,499.02

Step by Step Solution

1. Step 1: Write the proportion equation
   101,820.86 : 140,513.56 = 56,499.02 : x
2. Step 2: Convert to fraction form
   101,820.86/140,513.56 = 56,499.02/x
3. Step 3: Cross multiply
   101,820.86x = 140,513.56 × 56,499.02
4. Step 4: Simplify right side
   101,820.86x = 7,938,878,436.71
5. Step 5: Solve for x
   x = 7,938,878,436.71/101,820.86
6. Step 6: Final answer
   x = 77,969.08