Finding the Fourth Proportional to 137,663.53, 189,978.59 and 77,238.54

Step by Step Solution

1. Step 1: Write the proportion equation
   137,663.53 : 189,978.59 = 77,238.54 : x
2. Step 2: Convert to fraction form
   137,663.53/189,978.59 = 77,238.54/x
3. Step 3: Cross multiply
   137,663.53x = 189,978.59 × 77,238.54
4. Step 4: Simplify right side
   137,663.53x = 14,673,668,536.67
5. Step 5: Solve for x
   x = 14,673,668,536.67/137,663.53
6. Step 6: Final answer
   x = 106,590.82