Finding the Fourth Proportional to 98,693.37, 136,036.89 and 77,145.05

Step by Step Solution

1. Step 1: Write the proportion equation
   98,693.37 : 136,036.89 = 77,145.05 : x
2. Step 2: Convert to fraction form
   98,693.37/136,036.89 = 77,145.05/x
3. Step 3: Cross multiply
   98,693.37x = 136,036.89 × 77,145.05
4. Step 4: Simplify right side
   98,693.37x = 10,494,572,000.71
5. Step 5: Solve for x
   x = 10,494,572,000.71/98,693.37
6. Step 6: Final answer
   x = 106,335.13