Finding the Fourth Proportional to 101,300.76, 139,803.47 and 55,987.59

Step by Step Solution

1. Step 1: Write the proportion equation
   101,300.76 : 139,803.47 = 55,987.59 : x
2. Step 2: Convert to fraction form
   101,300.76/139,803.47 = 55,987.59/x
3. Step 3: Cross multiply
   101,300.76x = 139,803.47 × 55,987.59
4. Step 4: Simplify right side
   101,300.76x = 7,827,259,358.94
5. Step 5: Solve for x
   x = 7,827,259,358.94/101,300.76
6. Step 6: Final answer
   x = 77,267.53