Finding the Fourth Proportional to 113,573,430, 156,731,333.40 and 64,685,406.96

Step by Step Solution

1. Step 1: Write the proportion equation
   113,573,430 : 156,731,333.40 = 64,685,406.96 : x
2. Step 2: Convert to fraction form
   113,573,430/156,731,333.40 = 64,685,406.96/x
3. Step 3: Cross multiply
   113,573,430x = 156,731,333.40 × 64,685,406.96
4. Step 4: Simplify right side
   113,573,430x = 10,138,230,084,362,440
5. Step 5: Solve for x
   x = 10,138,230,084,362,440/113,573,430
6. Step 6: Final answer
   x = 89,265,861.60