Finding the Fourth Proportional to 99,066.39, 136,679.31 and 56,041.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,066.39 : 136,679.31 = 56,041.71 : x
2. Step 2: Convert to fraction form
   99,066.39/136,679.31 = 56,041.71/x
3. Step 3: Cross multiply
   99,066.39x = 136,679.31 × 56,041.71
4. Step 4: Simplify right side
   99,066.39x = 7,659,742,254.02
5. Step 5: Solve for x
   x = 7,659,742,254.02/99,066.39
6. Step 6: Final answer
   x = 77,319.28