Finding the Fourth Proportional to 101,102.98, 139,522.59 and 55,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,102.98 : 139,522.59 = 55,781.50 : x
2. Step 2: Convert to fraction form
   101,102.98/139,522.59 = 55,781.50/x
3. Step 3: Cross multiply
   101,102.98x = 139,522.59 × 55,781.50
4. Step 4: Simplify right side
   101,102.98x = 7,782,779,354.09
5. Step 5: Solve for x
   x = 7,782,779,354.09/101,102.98
6. Step 6: Final answer
   x = 76,978.73