Finding the Fourth Proportional to 83,191.59, 124,741.71 and 40,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   83,191.59 : 124,741.71 = 40,978.80 : x
2. Step 2: Convert to fraction form
   83,191.59/124,741.71 = 40,978.80/x
3. Step 3: Cross multiply
   83,191.59x = 124,741.71 × 40,978.80
4. Step 4: Simplify right side
   83,191.59x = 5,111,765,585.75
5. Step 5: Solve for x
   x = 5,111,765,585.75/83,191.59
6. Step 6: Final answer
   x = 61,445.70