Finding the Fourth Proportional to 153,687,978.85, 212,088,776.70 and 83,123,667.85

Step by Step Solution

1. Step 1: Write the proportion equation
   153,687,978.85 : 212,088,776.70 = 83,123,667.85 : x
2. Step 2: Convert to fraction form
   153,687,978.85/212,088,776.70 = 83,123,667.85/x
3. Step 3: Cross multiply
   153,687,978.85x = 212,088,776.70 × 83,123,667.85
4. Step 4: Simplify right side
   153,687,978.85x = 17,629,597,029,123,616
5. Step 5: Solve for x
   x = 17,629,597,029,123,616/153,687,978.85
6. Step 6: Final answer
   x = 114,710,318.67