Finding the Fourth Proportional to 77,667.85, 116,331.04 and 64,188.10

Step by Step Solution

1. Step 1: Write the proportion equation
   77,667.85 : 116,331.04 = 64,188.10 : x
2. Step 2: Convert to fraction form
   77,667.85/116,331.04 = 64,188.10/x
3. Step 3: Cross multiply
   77,667.85x = 116,331.04 × 64,188.10
4. Step 4: Simplify right side
   77,667.85x = 7,467,068,428.62
5. Step 5: Solve for x
   x = 7,467,068,428.62/77,667.85
6. Step 6: Final answer
   x = 96,141.05