Finding the Fourth Proportional to 101,300.88, 139,803.64 and 55,987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,300.88 : 139,803.64 = 55,987.72 : x
2. Step 2: Convert to fraction form
   101,300.88/139,803.64 = 55,987.72/x
3. Step 3: Cross multiply
   101,300.88x = 139,803.64 × 55,987.72
4. Step 4: Simplify right side
   101,300.88x = 7,827,286,561.82
5. Step 5: Solve for x
   x = 7,827,286,561.82/101,300.88
6. Step 6: Final answer
   x = 77,267.70