Finding the Fourth Proportional to 83,139.50, 114,698.52 and 61,387.91

Step by Step Solution

1. Step 1: Write the proportion equation
   83,139.50 : 114,698.52 = 61,387.91 : x
2. Step 2: Convert to fraction form
   83,139.50/114,698.52 = 61,387.91/x
3. Step 3: Cross multiply
   83,139.50x = 114,698.52 × 61,387.91
4. Step 4: Simplify right side
   83,139.50x = 7,041,101,849.40
5. Step 5: Solve for x
   x = 7,041,101,849.40/83,139.50
6. Step 6: Final answer
   x = 84,690.22