Finding the Fourth Proportional to 101,308.72, 139,798.95 and 55,985.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101,308.72 : 139,798.95 = 55,985.89 : x
2. Step 2: Convert to fraction form
   101,308.72/139,798.95 = 55,985.89/x
3. Step 3: Cross multiply
   101,308.72x = 139,798.95 × 55,985.89
4. Step 4: Simplify right side
   101,308.72x = 7,826,768,636.82
5. Step 5: Solve for x
   x = 7,826,768,636.82/101,308.72
6. Step 6: Final answer
   x = 77,256.61