Finding the Fourth Proportional to 99,058.32, 136,700.28 and 56,640.24

Step by Step Solution

1. Step 1: Write the proportion equation
   99,058.32 : 136,700.28 = 56,640.24 : x
2. Step 2: Convert to fraction form
   99,058.32/136,700.28 = 56,640.24/x
3. Step 3: Cross multiply
   99,058.32x = 136,700.28 × 56,640.24
4. Step 4: Simplify right side
   99,058.32x = 7,742,736,667.27
5. Step 5: Solve for x
   x = 7,742,736,667.27/99,058.32
6. Step 6: Final answer
   x = 78,163.42