Finding the Fourth Proportional to 136,984,061.12, 189,045,727.20 and 81,262,472

Step by Step Solution

1. Step 1: Write the proportion equation
   136,984,061.12 : 189,045,727.20 = 81,262,472 : x
2. Step 2: Convert to fraction form
   136,984,061.12/189,045,727.20 = 81,262,472/x
3. Step 3: Cross multiply
   136,984,061.12x = 189,045,727.20 × 81,262,472
4. Step 4: Simplify right side
   136,984,061.12x = 15,362,323,113,309,638
5. Step 5: Solve for x
   x = 15,362,323,113,309,638/136,984,061.12
6. Step 6: Final answer
   x = 112,146,792.76